diff --git a/.prettierignore b/.prettierignore
index 1ba37c91d..cf98afb3c 100644
--- a/.prettierignore
+++ b/.prettierignore
@@ -12,4 +12,5 @@ emsdk-cache
 .output
 packages/internal-tsconfig/*.d.*ts
 packages/internal-tsconfig/*.*js
-vendor
\ No newline at end of file
+vendor
+CLAUDE.md
\ No newline at end of file
diff --git a/.vscode/c_cpp_properties.json b/.vscode/c_cpp_properties.json
index 6ea843285..8c8be0dfe 100644
--- a/.vscode/c_cpp_properties.json
+++ b/.vscode/c_cpp_properties.json
@@ -1,45 +1,53 @@
 {
-  "configurations": [
-    {
-      "name": "Mac",
-      "includePath": [
-        "${workspaceFolder}/**",
-        "/opt/homebrew/Cellar/emscripten/3.1.7/libexec/system/include/**",
-        "/opt/homebrew/Cellar/emscripten/3.1.7/libexec/cache/sysroot/include/**",
-        "/opt/homebrew/Cellar/emscripten/3.1.7/libexec/llvm/lib/clang/15.0.0/include/**",
-        "/opt/homebrew/Cellar/emscripten/3.1.7/libexec/cache/sysroot/include/SDL",
-        "/opt/homebrew/Cellar/emscripten/3.1.7/libexec/cache/sysroot/include/compat",
-        "/opt/homebrew/Cellar/emscripten/3.1.7/libexec/llvm/lib/clang/15.0.0/include",
-        "/opt/homebrew/Cellar/emscripten/3.1.7/libexec/cache/sysroot/include"
-      ],
-      "defines": ["QTS_ASYNCIFY=1", "QTS_DEBUG_MODE=1", "__EMSCRIPTEN__=1"],
-      "macFrameworkPath": [
-        "/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/System/Library/Frameworks"
-      ],
-      "compilerPath": "/usr/bin/clang",
-      "cStandard": "c17",
-      "cppStandard": "c++98",
-      "intelliSenseMode": "macos-clang-arm64",
-      "compilerArgs": [],
-      "mergeConfigurations": false,
-      "browse": {
-        "path": ["${workspaceFolder}/**"],
-        "limitSymbolsToIncludedHeaders": true
-      },
-      "configurationProvider": "ms-vscode.makefile-tools"
-    },
-    {
-      "name": "Emscripten",
-      "includePath": ["${workspaceFolder}/**"],
-      "defines": [],
-      "macFrameworkPath": [
-        "/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/System/Library/Frameworks"
-      ],
-      "compilerPath": "/opt/homebrew/bin/emcc",
-      "cStandard": "c17",
-      "cppStandard": "c++98",
-      "intelliSenseMode": "macos-clang-arm64"
-    }
-  ],
-  "version": 4
-}
+    "configurations": [
+        {
+            "name": "Mac",
+            "includePath": [
+                "${workspaceFolder}/**",
+                "/opt/homebrew/Cellar/emscripten/5.0.1/libexec/system/include/**",
+                "/opt/homebrew/Cellar/emscripten/5.0.1/libexec/cache/sysroot/include/**",
+                "/opt/homebrew/Cellar/emscripten/5.0.1/libexec/llvm/lib/clang/23/include/**",
+                "/opt/homebrew/Cellar/emscripten/5.0.1/libexec/cache/sysroot/include/SDL",
+                "/opt/homebrew/Cellar/emscripten/5.0.1/libexec/cache/sysroot/include/compat",
+                "/opt/homebrew/Cellar/emscripten/5.0.1/libexec/llvm/lib/clang/23/include",
+                "/opt/homebrew/Cellar/emscripten/5.0.1/libexec/cache/sysroot/include"
+            ],
+            "defines": [
+                "QTS_ASYNCIFY=1",
+                "QTS_DEBUG_MODE=1",
+                "__EMSCRIPTEN__=1"
+            ],
+            "macFrameworkPath": [
+                "/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/System/Library/Frameworks"
+            ],
+            "compilerPath": "/usr/bin/clang",
+            "cStandard": "c17",
+            "cppStandard": "c++98",
+            "intelliSenseMode": "macos-clang-arm64",
+            "compilerArgs": [],
+            "mergeConfigurations": false,
+            "browse": {
+                "path": [
+                    "${workspaceFolder}/**"
+                ],
+                "limitSymbolsToIncludedHeaders": true
+            },
+            "configurationProvider": "ms-vscode.makefile-tools"
+        },
+        {
+            "name": "Emscripten",
+            "includePath": [
+                "${workspaceFolder}/**"
+            ],
+            "defines": [],
+            "macFrameworkPath": [
+                "/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/System/Library/Frameworks"
+            ],
+            "compilerPath": "/opt/homebrew/bin/emcc",
+            "cStandard": "c17",
+            "cppStandard": "c++98",
+            "intelliSenseMode": "macos-clang-arm64"
+        }
+    ],
+    "version": 4
+}
\ No newline at end of file
diff --git a/CHANGELOG.md b/CHANGELOG.md
index d268c48ee..4678e141f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,21 @@
 # Changelog
 
+## v0.32.0
+
+- [#227](https://github.com/justjake/quickjs-emscripten/pull/227)
+
+  - Re-works function binding in `newFunction` to use a different proxying strategy based on a new abstraction, `HostRef`. HostRef allows tracking references of host values from guest handles. Once all references to the HostRef object are disposed (either in the host, or GC'd in the guest), the host value will be dereferenced and become garbage collectable.
+  - Functions passed to `newFunction` are interned in the runtime's `HostRefMap` until dereferenced.
+  - `HostRef` is also exposed directly for use from `QuickJSContext`, see `newHostRef`, `toHostRef`, `unwrapHostRef` in the docs.
+  - Added `QuickJSContext.newConstructorFunction`, such functions will have their `this` set to the newly constructed object, although they may also return a new object.
+
+- [#244](https://github.com/justjake/quickjs-emscripten/pull/244) Upgrade [quickjs-ng](https://github.com/quickjs-ng/quickjs) to [v0.12.1](https://github.com/quickjs-ng/quickjs/releases/tag/v0.12.1).
+- [#243](https://github.com/justjake/quickjs-emscripten/pull/243) (thanks to @josh-) Upgrade [bellard/quickjs](https://github.com/bellard/quickjs) to [2025-09-13+f1139494](https://github.com/bellard/quickjs/commit/f1139494d18a2053630c5ed3384a42bb70db3c53). Review the [QuickJS changelog](https://github.com/bellard/quickjs/blob/f1139494d18a2053630c5ed3384a42bb70db3c53/Changelog) for details.
+  - Some intrinsics like `BigInt` are now always enabled.
+  - BigNum extension removed.
+- [#242](https://github.com/justjake/quickjs-emscripten/pull/242) Upgrade to Emscripten 5.0.1.
+- [#221](https://github.com/justjake/quickjs-emscripten/pull/221) (thanks to @melbourne2991) Support generator return values in QuickJSIterator.
+
 ## v0.31.0
 
 - [#137](https://github.com/justjake/quickjs-emscripten/pull/137)
diff --git a/CLAUDE.md b/CLAUDE.md
index 11d1e4d71..6a850c5c4 100644
--- a/CLAUDE.md
+++ b/CLAUDE.md
@@ -57,3 +57,87 @@ Other test filters:
 - `scripts/generate.ts` - Generates FFI bindings and symbols
 - `templates/Variant.mk` - Makefile template for variants
 - `c/interface.c` - C interface to QuickJS exposed to JavaScript
+
+## QuickJS C API Tips
+
+### Value Ownership
+
+QuickJS has strict ownership semantics. Functions either "consume" (take ownership of) or "borrow" values:
+
+**Functions that CONSUME values (caller must NOT free afterward):**
+
+- `JS_DefinePropertyValue` - consumes `val`
+- `JS_DefinePropertyValueStr` - consumes `val`
+- `JS_DefinePropertyValueUint32` - consumes `val`
+- `JS_SetPropertyValue` - consumes `val`
+- `JS_SetPropertyStr` - consumes `val`
+- `JS_Throw` - consumes the error value
+
+**Functions that DUP values internally (caller SHOULD free afterward):**
+
+- `JS_NewCFunctionData` - calls `JS_DupValue` on data values, so free your reference after
+- `JS_SetProperty` - dups the value
+
+**Common double-free bug pattern:**
+
+```c
+// WRONG - double free!
+JSValue val = JS_NewString(ctx, "hello");
+JS_DefinePropertyValueStr(ctx, obj, "name", val, JS_PROP_CONFIGURABLE);
+JS_FreeValue(ctx, val);  // BUG: val was already consumed!
+
+// CORRECT
+JSValue val = JS_NewString(ctx, "hello");
+JS_DefinePropertyValueStr(ctx, obj, "name", val, JS_PROP_CONFIGURABLE);
+// No JS_FreeValue needed - value is consumed
+```
+
+### quickjs vs quickjs-ng Differences
+
+Some functions have different signatures between bellard/quickjs and quickjs-ng:
+
+```c
+// bellard/quickjs - class ID is global
+JS_NewClassID(&class_id);
+
+// quickjs-ng - class ID is per-runtime
+JS_NewClassID(rt, &class_id);
+```
+
+Use `#ifdef QTS_USE_QUICKJS_NG` for compatibility:
+
+```c
+#ifdef QTS_USE_QUICKJS_NG
+  JS_NewClassID(rt, &class_id);
+#else
+  JS_NewClassID(&class_id);
+#endif
+```
+
+### Class Registration
+
+- `JS_NewClassID` allocates a new class ID (only call once globally or per-runtime for ng)
+- `JS_NewClass` registers the class definition with a runtime
+- `JS_IsRegisteredClass` checks if a class is already registered with a runtime
+- Class prototypes default to `JS_NULL` for new classes - set with `JS_SetClassProto` if needed
+
+### Disposal Order
+
+When disposing resources, order matters for finalizers:
+
+```typescript
+// CORRECT: Free runtime first so GC finalizers can call back to JS
+const rt = new Lifetime(ffi.QTS_NewRuntime(), undefined, (rt_ptr) => {
+  ffi.QTS_FreeRuntime(rt_ptr);        // 1. Free runtime - runs GC finalizers
+  callbacks.deleteRuntime(rt_ptr);     // 2. Then delete callbacks
+});
+```
+
+### GC and Prevent Corruption Assertions
+
+If you see assertions like:
+- `Assertion failed: i != 0, at: quickjs.c, JS_FreeAtomStruct` - atom hash corruption (often double-free)
+- `Assertion failed: list_empty(&rt->gc_obj_list)` - objects leaked
+- `Assertion failed: p->gc_obj_type == JS_GC_OBJ_TYPE_JS_OBJECT` - memory corruption
+
+These usually indicate memory management bugs: double-frees, use-after-free, or missing frees.
diff --git a/c/interface.c b/c/interface.c
index 85ada074b..ff68294ab 100644
--- a/c/interface.c
+++ b/c/interface.c
@@ -94,6 +94,7 @@ void js_std_dump_error(JSContext *ctx);
 #define BorrowedHeapChar const char
 #define OwnedHeapChar char
 #define JSBorrowedChar const char
+#define HostRefId int32_t
 
 /**
  * Signal to our FFI code generator that this function should be called
@@ -116,7 +117,7 @@ void js_std_dump_error(JSContext *ctx);
 // Forward declarations for EM_JS callback functions
 // These are implemented via EM_JS macro but need forward declarations for C99 compliance
 #ifdef __EMSCRIPTEN__
-JSValue *qts_host_call_function(JSContext *ctx, JSValueConst *this_ptr, int argc, JSValueConst *argv, uint32_t magic_func_id);
+JSValue *qts_host_call_function(JSContext *ctx, JSValueConst *this_ptr, int argc, JSValueConst *argv, int32_t host_ref_id);
 int qts_host_interrupt_handler(JSRuntime *rt);
 char *qts_host_load_module_source(JSRuntime *rt, JSContext *ctx, const char *module_name);
 char *qts_host_normalize_module(JSRuntime *rt, JSContext *ctx, const char *module_base_name, const char *module_name);
@@ -279,6 +280,7 @@ EM_JS(void, set_asyncify_stack_size, (size_t size, size_t default_size), {
 /**
  * Set the stack size limit, in bytes. Set to 0 to disable.
  */
+
 void QTS_RuntimeSetMaxStackSize(JSRuntime *rt, size_t stack_size) {
 #ifdef QTS_ASYNCIFY
   set_asyncify_stack_size(stack_size, QTS_ASYNCIFY_DEFAULT_STACK_SIZE);
@@ -311,6 +313,92 @@ JSValueConst *QTS_GetTrue() {
   return &QTS_True;
 }
 
+// ----------------------------------------------------------------------------
+// HostRef - De-reference host value based on JSValue GC.
+// Used for functions
+
+static JSClassID host_ref_class_id;
+// todo: variant with mark callback
+
+typedef struct HostRef {
+  int32_t id;
+} HostRef;
+
+#ifdef __EMSCRIPTEN__
+EM_JS(void, qts_host_ref_free, (JSRuntime *rt, int32_t id), {
+  // For now we don't allow for async freeHostRef.
+  const asyncify = undefined;
+  Module['callbacks']['freeHostRef'](asyncify, rt, id);
+});
+#endif
+
+static void host_ref_finalizer(JSRuntime *rt, JSValue val) {
+  HostRef *hv = JS_GetOpaque(val, host_ref_class_id);
+  if (hv) {
+#ifdef __EMSCRIPTEN__
+    qts_host_ref_free(rt, hv->id);
+#endif
+    js_free_rt(rt, hv);
+  }
+}
+
+static JSClassDef host_ref_class = {
+  .class_name = "HostRef",
+  .finalizer = host_ref_finalizer,
+};
+
+static int host_ref_class_init(JSRuntime *rt) {
+  // Only allocate class ID once globally
+  if (host_ref_class_id == 0) {
+#ifdef QTS_USE_QUICKJS_NG
+    JS_NewClassID(rt, &host_ref_class_id);
+#else
+    JS_NewClassID(&host_ref_class_id);
+#endif
+  }
+  // Register class with this runtime if not already registered
+  // JS_NewClass returns 0 on success, -1 if already registered (which is fine)
+  if (!JS_IsRegisteredClass(rt, host_ref_class_id)) {
+    return JS_NewClass(rt, host_ref_class_id, &host_ref_class);
+  }
+  return 0;
+}
+
+static JSValue new_host_ref(JSContext *ctx, HostRefId id) {
+  HostRef *hv;
+  JSValue obj;
+  obj = JS_NewObjectClass(ctx, host_ref_class_id);
+  if (JS_IsException(obj)) {
+    return obj;
+  }
+
+  hv = js_mallocz(ctx, sizeof(*hv));
+  if (!hv) {
+    // js_mallocz returns NULL on failure and sets rt.exception to OutOfMemory
+    JS_FreeValue(ctx, obj);
+    return JS_EXCEPTION;
+  }
+
+  hv->id = id;
+  JS_SetOpaque(obj, hv);
+  return obj;
+}
+
+JSValue *QTS_NewHostRef(JSContext *ctx, HostRefId id) {
+  return jsvalue_to_heap(new_host_ref(ctx, id));
+}
+
+HostRefId QTS_GetHostRefId(JSValueConst *value) {
+  HostRef *hv = JS_GetOpaque(*value, host_ref_class_id);
+  if (hv) {
+    return hv->id;
+  }
+  return 0;
+}
+
+// ----------------------------------------------------------------------------
+// Context & Runtime
+
 /**
  * Standard FFI functions
  */
@@ -343,51 +431,63 @@ enum QTS_Intrinsic {
 };
 
 JSContext *QTS_NewContext(JSRuntime *rt, IntrinsicsFlags intrinsics) {
+  JSContext *ctx;
+
   if (intrinsics == 0) {
-    return JS_NewContext(rt);
+    ctx = JS_NewContext(rt);
+    if (ctx == NULL) {
+      return NULL;
+    }
+  } else {
+    ctx = JS_NewContextRaw(rt);
+    if (ctx == NULL) {
+      return NULL;
+    }
+
+    if (intrinsics & QTS_Intrinsic_BaseObjects) {
+      JS_AddIntrinsicBaseObjects(ctx);
+    }
+    if (intrinsics & QTS_Intrinsic_Date) {
+      JS_AddIntrinsicDate(ctx);
+    }
+    if (intrinsics & QTS_Intrinsic_Eval) {
+      JS_AddIntrinsicEval(ctx);
+    }
+  #ifndef QTS_USE_QUICKJS_NG
+    if (intrinsics & QTS_Intrinsic_StringNormalize) {
+      JS_AddIntrinsicStringNormalize(ctx);
+    }
+  #endif
+    if (intrinsics & QTS_Intrinsic_RegExp) {
+      JS_AddIntrinsicRegExp(ctx);
+    }
+    if (intrinsics & QTS_Intrinsic_RegExpCompiler) {
+      JS_AddIntrinsicRegExpCompiler(ctx);
+    }
+    if (intrinsics & QTS_Intrinsic_JSON) {
+      JS_AddIntrinsicJSON(ctx);
+    }
+    if (intrinsics & QTS_Intrinsic_Proxy) {
+      JS_AddIntrinsicProxy(ctx);
+    }
+    if (intrinsics & QTS_Intrinsic_MapSet) {
+      JS_AddIntrinsicMapSet(ctx);
+    }
+    if (intrinsics & QTS_Intrinsic_TypedArrays) {
+      JS_AddIntrinsicTypedArrays(ctx);
+    }
+    if (intrinsics & QTS_Intrinsic_Promise) {
+      JS_AddIntrinsicPromise(ctx);
+    }
+
+    // Note: BigInt is now always part of QuickJS core, no need for separate intrinsic
   }
 
-  JSContext *ctx = JS_NewContextRaw(rt);
-  if (ctx == NULL) {
+  if (host_ref_class_init(JS_GetRuntime(ctx)) != 0) {
+    JS_FreeContext(ctx);
     return NULL;
   }
 
-  if (intrinsics & QTS_Intrinsic_BaseObjects) {
-    JS_AddIntrinsicBaseObjects(ctx);
-  }
-  if (intrinsics & QTS_Intrinsic_Date) {
-    JS_AddIntrinsicDate(ctx);
-  }
-  if (intrinsics & QTS_Intrinsic_Eval) {
-    JS_AddIntrinsicEval(ctx);
-  }
-#ifndef QTS_USE_QUICKJS_NG
-  if (intrinsics & QTS_Intrinsic_StringNormalize) {
-    JS_AddIntrinsicStringNormalize(ctx);
-  }
-#endif
-  if (intrinsics & QTS_Intrinsic_RegExp) {
-    JS_AddIntrinsicRegExp(ctx);
-  }
-  if (intrinsics & QTS_Intrinsic_RegExpCompiler) {
-    JS_AddIntrinsicRegExpCompiler(ctx);
-  }
-  if (intrinsics & QTS_Intrinsic_JSON) {
-    JS_AddIntrinsicJSON(ctx);
-  }
-  if (intrinsics & QTS_Intrinsic_Proxy) {
-    JS_AddIntrinsicProxy(ctx);
-  }
-  if (intrinsics & QTS_Intrinsic_MapSet) {
-    JS_AddIntrinsicMapSet(ctx);
-  }
-  if (intrinsics & QTS_Intrinsic_TypedArrays) {
-    JS_AddIntrinsicTypedArrays(ctx);
-  }
-  if (intrinsics & QTS_Intrinsic_Promise) {
-    JS_AddIntrinsicPromise(ctx);
-  }
-  // Note: BigInt is now always part of QuickJS core, no need for separate intrinsic
   return ctx;
 }
 
@@ -1042,9 +1142,6 @@ int QTS_BuildIsAsyncify() {
 #endif
 }
 
-// ----------------------------------------------------------------------------
-// Module loading helpers
-
 // ----------------------------------------------------------------------------
 // C -> Host Callbacks
 // Note: inside EM_JS, we need to use ['...'] subscript syntax for accessing JS
@@ -1054,19 +1151,25 @@ int QTS_BuildIsAsyncify() {
 // -------------------
 // function: C -> Host
 #ifdef __EMSCRIPTEN__
-EM_JS(MaybeAsync(JSValue *), qts_host_call_function, (JSContext * ctx, JSValueConst *this_ptr, int argc, JSValueConst *argv, uint32_t magic_func_id), {
+EM_JS(MaybeAsync(JSValue *), qts_host_call_function, (JSContext * ctx, JSValueConst *this_ptr, int argc, JSValueConst *argv, HostRefId host_ref_id), {
 #ifdef QTS_ASYNCIFY
   const asyncify = {['handleSleep'] : Asyncify.handleSleep};
 #else
   const asyncify = undefined;
 #endif
-  return Module['callbacks']['callFunction'](asyncify, ctx, this_ptr, argc, argv, magic_func_id);
+  return Module['callbacks']['callFunction'](asyncify, ctx, this_ptr, argc, argv, host_ref_id);
 });
 #endif
 
 // Function: QuickJS -> C
-JSValue qts_call_function(JSContext *ctx, JSValueConst this_val, int argc, JSValueConst *argv, int magic) {
-  JSValue *result_ptr = qts_host_call_function(ctx, &this_val, argc, argv, magic);
+JSValue qts_call_function(JSContext *ctx, JSValueConst this_val, int argc, JSValueConst *argv, int magic, JSValue *func_data) {
+  int32_t host_ref_id = 0;
+  HostRef *host_ref = JS_GetOpaque(*func_data, host_ref_class_id);
+  if (host_ref) {
+    host_ref_id = host_ref->id;
+  }
+
+  JSValue *result_ptr = qts_host_call_function(ctx, &this_val, argc, argv, host_ref_id);
   if (result_ptr == NULL) {
     return JS_UNDEFINED;
   }
@@ -1076,19 +1179,46 @@ JSValue qts_call_function(JSContext *ctx, JSValueConst this_val, int argc, JSVal
 }
 
 // Function: Host -> QuickJS
-JSValue *QTS_NewFunction(JSContext *ctx, uint32_t func_id, const char *name) {
+JSValue *QTS_NewFunction(JSContext *ctx, const char *name, int arg_length, bool is_constructor, HostRefId host_ref_id) {
   IF_DEBUG {
     char msg[LOG_LEN];
-    snprintf(msg, LOG_LEN, "new_function(name: %s, magic: %d)", name, func_id);
+    snprintf(msg, LOG_LEN, "new_function(name: %s, length: %d, is_constructor: %d, host_ref_id: %d)", name, arg_length, is_constructor, host_ref_id);
     qts_log(msg);
   }
-  JSValue func_obj = JS_NewCFunctionMagic(
+
+  JSValue host_ref = new_host_ref(ctx, host_ref_id);
+  if (JS_IsException(host_ref)) {
+    return jsvalue_to_heap(host_ref);
+  }
+
+  JSValue func_obj = JS_NewCFunctionData(
       /* context */ ctx,
-      /* JSCFunctionMagic* */ &qts_call_function,
-      /* name */ name,
-      /* min argc */ 0,
-      /* function type */ JS_CFUNC_constructor_or_func_magic,
-      /* magic: fn id */ func_id);
+      /* JSCFunctionData* */ &qts_call_function,
+      /* fn.length */ 0,
+      /* magic */ 0,
+      /* data length */ 1,
+      /* data */ &host_ref
+  );
+  JS_FreeValue(ctx, host_ref);
+
+  if (JS_IsException(func_obj)) {
+    return jsvalue_to_heap(func_obj);
+  }
+
+  if (name && strlen(name) > 0) {
+    JSValue name_val = JS_NewString(ctx, name);
+    if (JS_IsException(name_val)) {
+      JS_FreeValue(ctx, func_obj);
+      return jsvalue_to_heap(name_val);
+    }
+    // JS_DefinePropertyValueStr takes ownership of name_val and frees it
+    JS_DefinePropertyValueStr(ctx, func_obj, "name", name_val, JS_PROP_CONFIGURABLE);
+  }
+
+  if (is_constructor) {
+    JS_SetConstructorBit(ctx, func_obj, is_constructor);
+  }
+
   return jsvalue_to_heap(func_obj);
 }
 
@@ -1124,6 +1254,8 @@ void QTS_RuntimeDisableInterruptHandler(JSRuntime *rt) {
   JS_SetInterruptHandler(rt, NULL, NULL);
 }
 
+// ----------------------------------------------------------------------------
+// Module loading helpers
 // --------------------
 // load module: C -> Host
 // TODO: a future version can support host returning JSModuleDef* directly;
diff --git a/doc/@jitl/quickjs-ffi-types/exports.md b/doc/@jitl/quickjs-ffi-types/exports.md
index 880f87859..0055c6301 100644
--- a/doc/@jitl/quickjs-ffi-types/exports.md
+++ b/doc/@jitl/quickjs-ffi-types/exports.md
@@ -84,7 +84,7 @@ for the Emscripten stack.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:246](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L246)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:253](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L253)
 
 ***
 
@@ -145,7 +145,7 @@ State of a promise.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-types.ts:131](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-types.ts#L131)
+[packages/quickjs-ffi-types/src/ffi-types.ts:136](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-types.ts#L136)
 
 ***
 
@@ -536,7 +536,7 @@ Bitfield options for QTS_NewContext intrinsics
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-types.ts:131](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-types.ts#L131)
+[packages/quickjs-ffi-types/src/ffi-types.ts:136](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-types.ts#L136)
 
 ## Functions
 
@@ -569,7 +569,7 @@ Bitfield options for QTS_NewContext intrinsics
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-types.ts:136](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-types.ts#L136)
+[packages/quickjs-ffi-types/src/ffi-types.ts:141](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-types.ts#L141)
 
 ***
 
diff --git a/doc/@jitl/quickjs-ffi-types/interfaces/EmscriptenModule.md b/doc/@jitl/quickjs-ffi-types/interfaces/EmscriptenModule.md
index 6ca46e910..d60f9b2d5 100644
--- a/doc/@jitl/quickjs-ffi-types/interfaces/EmscriptenModule.md
+++ b/doc/@jitl/quickjs-ffi-types/interfaces/EmscriptenModule.md
@@ -49,7 +49,7 @@ QuickJS.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:168](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L168)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:169](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L169)
 
 ***
 
@@ -59,7 +59,7 @@ QuickJS.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:158](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L158)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:159](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L159)
 
 ***
 
@@ -69,7 +69,7 @@ QuickJS.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:159](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L159)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:160](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L160)
 
 ***
 
@@ -79,7 +79,7 @@ QuickJS.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:157](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L157)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:158](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L158)
 
 ***
 
@@ -89,7 +89,7 @@ QuickJS.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:163](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L163)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:164](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L164)
 
 ***
 
@@ -99,7 +99,7 @@ QuickJS.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:164](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L164)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:165](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L165)
 
 ***
 
@@ -109,7 +109,7 @@ QuickJS.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:161](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L161)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:162](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L162)
 
 ***
 
@@ -119,7 +119,7 @@ QuickJS.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:162](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L162)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:163](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L163)
 
 ***
 
@@ -129,7 +129,7 @@ QuickJS.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:160](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L160)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:161](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L161)
 
 ***
 
@@ -139,7 +139,7 @@ QuickJS.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:167](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L167)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:168](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L168)
 
 ***
 
@@ -149,7 +149,7 @@ QuickJS.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:166](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L166)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:167](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L167)
 
 ***
 
@@ -165,7 +165,7 @@ Compile this to WebAssembly.Module
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:104](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L104)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:105](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L105)
 
 ***
 
@@ -181,7 +181,7 @@ If provided, use this WebAssembly.Memory instead of an automatically created one
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:107](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L107)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:108](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L108)
 
 ## Methods
 
@@ -204,7 +204,7 @@ https://emscripten.org/docs/api_reference/preamble.js.html#UTF8ToString
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:144](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L144)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:145](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L145)
 
 ***
 
@@ -222,7 +222,7 @@ https://emscripten.org/docs/api_reference/preamble.js.html#UTF8ToString
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:148](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L148)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:149](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L149)
 
 ***
 
@@ -240,7 +240,7 @@ https://emscripten.org/docs/api_reference/preamble.js.html#UTF8ToString
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:147](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L147)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:148](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L148)
 
 ***
 
@@ -273,7 +273,7 @@ https://emscripten.org/docs/api_reference/preamble.js.html#UTF8ToString
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:149](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L149)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:150](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L150)
 
 ***
 
@@ -299,7 +299,7 @@ Create an instance of the WASM module, call onSuccess(instance), then return ins
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:110](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L110)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:111](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L111)
 
 ***
 
@@ -317,7 +317,7 @@ Create an instance of the WASM module, call onSuccess(instance), then return ins
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:145](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L145)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:146](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L146)
 
 ***
 
@@ -361,7 +361,7 @@ Often `''` (empty string)
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:97](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L97)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:98](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L98)
 
 ***
 
@@ -385,7 +385,7 @@ Called by emscripten as dependencies blocking initialization are added or fulfil
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:116](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L116)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:117](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L117)
 
 ***
 
@@ -410,7 +410,7 @@ https://emscripten.org/docs/api_reference/preamble.js.html#stringToUTF8
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:139](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L139)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:140](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L140)
 
 ***
 
diff --git a/doc/@jitl/quickjs-ffi-types/interfaces/EmscriptenModuleLoader.md b/doc/@jitl/quickjs-ffi-types/interfaces/EmscriptenModuleLoader.md
index 4192e3ac0..c62d98cc8 100644
--- a/doc/@jitl/quickjs-ffi-types/interfaces/EmscriptenModuleLoader.md
+++ b/doc/@jitl/quickjs-ffi-types/interfaces/EmscriptenModuleLoader.md
@@ -22,7 +22,7 @@
 
 ## Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:249](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L249)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:256](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L256)
 
 ***
 
diff --git a/doc/@jitl/quickjs-ffi-types/interfaces/EmscriptenModuleLoaderOptions.md b/doc/@jitl/quickjs-ffi-types/interfaces/EmscriptenModuleLoaderOptions.md
index f1159f51b..b141f720b 100644
--- a/doc/@jitl/quickjs-ffi-types/interfaces/EmscriptenModuleLoaderOptions.md
+++ b/doc/@jitl/quickjs-ffi-types/interfaces/EmscriptenModuleLoaderOptions.md
@@ -35,7 +35,7 @@ Compile this to WebAssembly.Module
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:104](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L104)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:105](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L105)
 
 ***
 
@@ -47,7 +47,7 @@ If provided, use this WebAssembly.Memory instead of an automatically created one
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:107](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L107)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:108](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L108)
 
 ## Methods
 
@@ -69,7 +69,7 @@ Create an instance of the WASM module, call onSuccess(instance), then return ins
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:110](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L110)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:111](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L111)
 
 ***
 
@@ -109,7 +109,7 @@ Often `''` (empty string)
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:97](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L97)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:98](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L98)
 
 ***
 
@@ -129,7 +129,7 @@ Called by emscripten as dependencies blocking initialization are added or fulfil
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:116](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L116)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:117](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L117)
 
 ***
 
diff --git a/doc/@jitl/quickjs-ffi-types/interfaces/QuickJSAsyncEmscriptenModule.md b/doc/@jitl/quickjs-ffi-types/interfaces/QuickJSAsyncEmscriptenModule.md
index 5236da5a1..9c357d86b 100644
--- a/doc/@jitl/quickjs-ffi-types/interfaces/QuickJSAsyncEmscriptenModule.md
+++ b/doc/@jitl/quickjs-ffi-types/interfaces/QuickJSAsyncEmscriptenModule.md
@@ -55,7 +55,7 @@ QuickJS.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:168](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L168)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:169](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L169)
 
 ***
 
@@ -69,7 +69,7 @@ QuickJS.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:158](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L158)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:159](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L159)
 
 ***
 
@@ -83,7 +83,7 @@ QuickJS.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:159](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L159)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:160](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L160)
 
 ***
 
@@ -97,7 +97,7 @@ QuickJS.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:157](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L157)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:158](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L158)
 
 ***
 
@@ -111,7 +111,7 @@ QuickJS.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:163](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L163)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:164](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L164)
 
 ***
 
@@ -125,7 +125,7 @@ QuickJS.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:164](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L164)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:165](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L165)
 
 ***
 
@@ -139,7 +139,7 @@ QuickJS.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:161](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L161)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:162](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L162)
 
 ***
 
@@ -153,7 +153,7 @@ QuickJS.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:162](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L162)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:163](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L163)
 
 ***
 
@@ -167,7 +167,7 @@ QuickJS.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:160](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L160)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:161](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L161)
 
 ***
 
@@ -181,7 +181,7 @@ QuickJS.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:167](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L167)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:168](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L168)
 
 ***
 
@@ -195,7 +195,7 @@ QuickJS.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:166](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L166)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:167](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L167)
 
 ***
 
@@ -205,7 +205,7 @@ QuickJS.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:243](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L243)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:250](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L250)
 
 ***
 
@@ -219,7 +219,7 @@ Implement this field
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:242](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L242)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:249](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L249)
 
 ***
 
@@ -235,7 +235,7 @@ Compile this to WebAssembly.Module
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:104](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L104)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:105](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L105)
 
 ***
 
@@ -251,7 +251,7 @@ If provided, use this WebAssembly.Memory instead of an automatically created one
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:107](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L107)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:108](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L108)
 
 ## Methods
 
@@ -278,7 +278,7 @@ https://emscripten.org/docs/api_reference/preamble.js.html#UTF8ToString
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:144](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L144)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:145](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L145)
 
 ***
 
@@ -300,7 +300,7 @@ https://emscripten.org/docs/api_reference/preamble.js.html#UTF8ToString
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:148](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L148)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:149](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L149)
 
 ***
 
@@ -322,7 +322,7 @@ https://emscripten.org/docs/api_reference/preamble.js.html#UTF8ToString
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:147](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L147)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:148](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L148)
 
 ***
 
@@ -359,7 +359,7 @@ https://emscripten.org/docs/api_reference/preamble.js.html#UTF8ToString
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:149](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L149)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:150](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L150)
 
 ***
 
@@ -385,7 +385,7 @@ Create an instance of the WASM module, call onSuccess(instance), then return ins
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:110](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L110)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:111](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L111)
 
 ***
 
@@ -407,7 +407,7 @@ Create an instance of the WASM module, call onSuccess(instance), then return ins
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:145](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L145)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:146](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L146)
 
 ***
 
@@ -451,7 +451,7 @@ Often `''` (empty string)
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:97](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L97)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:98](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L98)
 
 ***
 
@@ -475,7 +475,7 @@ Called by emscripten as dependencies blocking initialization are added or fulfil
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:116](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L116)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:117](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L117)
 
 ***
 
@@ -504,7 +504,7 @@ https://emscripten.org/docs/api_reference/preamble.js.html#stringToUTF8
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:139](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L139)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:140](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L140)
 
 ***
 
diff --git a/doc/@jitl/quickjs-ffi-types/interfaces/QuickJSAsyncFFI.md b/doc/@jitl/quickjs-ffi-types/interfaces/QuickJSAsyncFFI.md
index db50ca6ab..8efc808c6 100644
--- a/doc/@jitl/quickjs-ffi-types/interfaces/QuickJSAsyncFFI.md
+++ b/doc/@jitl/quickjs-ffi-types/interfaces/QuickJSAsyncFFI.md
@@ -41,6 +41,7 @@ library.
   - [QTS\_GetFalse](QuickJSAsyncFFI.md#qts-getfalse)
   - [QTS\_GetFloat64](QuickJSAsyncFFI.md#qts-getfloat64)
   - [QTS\_GetGlobalObject](QuickJSAsyncFFI.md#qts-getglobalobject)
+  - [QTS\_GetHostRefId](QuickJSAsyncFFI.md#qts-gethostrefid)
   - [QTS\_GetLength](QuickJSAsyncFFI.md#qts-getlength)
   - [QTS\_GetModuleNamespace](QuickJSAsyncFFI.md#qts-getmodulenamespace)
   - [QTS\_GetNull](QuickJSAsyncFFI.md#qts-getnull)
@@ -64,6 +65,7 @@ library.
   - [QTS\_NewError](QuickJSAsyncFFI.md#qts-newerror)
   - [QTS\_NewFloat64](QuickJSAsyncFFI.md#qts-newfloat64)
   - [QTS\_NewFunction](QuickJSAsyncFFI.md#qts-newfunction)
+  - [QTS\_NewHostRef](QuickJSAsyncFFI.md#qts-newhostref)
   - [QTS\_NewObject](QuickJSAsyncFFI.md#qts-newobject)
   - [QTS\_NewObjectProto](QuickJSAsyncFFI.md#qts-newobjectproto)
   - [QTS\_NewPromiseCapability](QuickJSAsyncFFI.md#qts-newpromisecapability)
@@ -105,7 +107,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:39](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L39)
+[packages/quickjs-ffi-types/src/ffi-async.ts:40](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L40)
 
 ***
 
@@ -125,7 +127,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:250](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L250)
+[packages/quickjs-ffi-types/src/ffi-async.ts:259](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L259)
 
 ***
 
@@ -139,7 +141,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:248](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L248)
+[packages/quickjs-ffi-types/src/ffi-async.ts:251](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L251)
 
 ***
 
@@ -153,7 +155,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:247](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L247)
+[packages/quickjs-ffi-types/src/ffi-async.ts:250](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L250)
 
 ***
 
@@ -167,7 +169,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:47](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L47)
+[packages/quickjs-ffi-types/src/ffi-async.ts:48](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L48)
 
 ***
 
@@ -193,7 +195,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:173](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L173)
+[packages/quickjs-ffi-types/src/ffi-async.ts:176](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L176)
 
 ***
 
@@ -219,7 +221,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:180](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L180)
+[packages/quickjs-ffi-types/src/ffi-async.ts:183](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L183)
 
 ***
 
@@ -253,7 +255,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:148](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L148)
+[packages/quickjs-ffi-types/src/ffi-async.ts:151](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L151)
 
 ***
 
@@ -273,7 +275,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:188](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L188)
+[packages/quickjs-ffi-types/src/ffi-async.ts:191](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L191)
 
 ***
 
@@ -293,7 +295,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:192](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L192)
+[packages/quickjs-ffi-types/src/ffi-async.ts:195](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L195)
 
 ***
 
@@ -313,7 +315,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:61](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L61)
+[packages/quickjs-ffi-types/src/ffi-async.ts:64](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L64)
 
 ***
 
@@ -341,7 +343,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:196](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L196)
+[packages/quickjs-ffi-types/src/ffi-async.ts:199](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L199)
 
 ***
 
@@ -369,7 +371,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:204](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L204)
+[packages/quickjs-ffi-types/src/ffi-async.ts:207](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L207)
 
 ***
 
@@ -391,7 +393,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:106](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L106)
+[packages/quickjs-ffi-types/src/ffi-async.ts:109](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L109)
 
 ***
 
@@ -413,7 +415,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:111](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L111)
+[packages/quickjs-ffi-types/src/ffi-async.ts:114](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L114)
 
 ***
 
@@ -433,7 +435,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:60](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L60)
+[packages/quickjs-ffi-types/src/ffi-async.ts:63](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L63)
 
 ***
 
@@ -451,7 +453,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:56](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L56)
+[packages/quickjs-ffi-types/src/ffi-async.ts:59](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L59)
 
 ***
 
@@ -469,7 +471,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:54](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L54)
+[packages/quickjs-ffi-types/src/ffi-async.ts:57](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L57)
 
 ***
 
@@ -489,7 +491,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:57](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L57)
+[packages/quickjs-ffi-types/src/ffi-async.ts:60](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L60)
 
 ***
 
@@ -509,7 +511,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:58](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L58)
+[packages/quickjs-ffi-types/src/ffi-async.ts:61](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L61)
 
 ***
 
@@ -529,7 +531,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:59](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L59)
+[packages/quickjs-ffi-types/src/ffi-async.ts:62](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L62)
 
 ***
 
@@ -549,7 +551,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:83](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L83)
+[packages/quickjs-ffi-types/src/ffi-async.ts:86](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L86)
 
 ***
 
@@ -569,7 +571,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:87](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L87)
+[packages/quickjs-ffi-types/src/ffi-async.ts:90](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L90)
 
 ***
 
@@ -587,7 +589,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:245](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L245)
+[packages/quickjs-ffi-types/src/ffi-async.ts:248](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L248)
 
 ***
 
@@ -601,7 +603,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:51](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L51)
+[packages/quickjs-ffi-types/src/ffi-async.ts:52](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L52)
 
 ***
 
@@ -621,7 +623,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:77](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L77)
+[packages/quickjs-ffi-types/src/ffi-async.ts:80](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L80)
 
 ***
 
@@ -639,7 +641,25 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:231](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L231)
+[packages/quickjs-ffi-types/src/ffi-async.ts:234](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L234)
+
+***
+
+### QTS\_GetHostRefId
+
+> **QTS\_GetHostRefId**: (`value`) => `HostRefId`
+
+#### Parameters
+
+• **value**: [`JSValuePointer`](../exports.md#jsvaluepointer) \| [`JSValueConstPointer`](../exports.md#jsvalueconstpointer)
+
+#### Returns
+
+`HostRefId`
+
+#### Source
+
+[packages/quickjs-ffi-types/src/ffi-async.ts:55](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L55)
 
 ***
 
@@ -661,7 +681,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:220](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L220)
+[packages/quickjs-ffi-types/src/ffi-async.ts:223](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L223)
 
 ***
 
@@ -681,7 +701,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:212](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L212)
+[packages/quickjs-ffi-types/src/ffi-async.ts:215](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L215)
 
 ***
 
@@ -695,7 +715,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:50](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L50)
+[packages/quickjs-ffi-types/src/ffi-async.ts:51](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L51)
 
 ***
 
@@ -721,7 +741,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:159](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L159)
+[packages/quickjs-ffi-types/src/ffi-async.ts:162](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L162)
 
 ***
 
@@ -747,7 +767,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:166](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L166)
+[packages/quickjs-ffi-types/src/ffi-async.ts:169](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L169)
 
 ***
 
@@ -769,7 +789,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:116](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L116)
+[packages/quickjs-ffi-types/src/ffi-async.ts:119](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L119)
 
 ***
 
@@ -791,7 +811,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:126](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L126)
+[packages/quickjs-ffi-types/src/ffi-async.ts:129](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L129)
 
 ***
 
@@ -813,7 +833,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:131](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L131)
+[packages/quickjs-ffi-types/src/ffi-async.ts:134](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L134)
 
 ***
 
@@ -835,7 +855,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:121](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L121)
+[packages/quickjs-ffi-types/src/ffi-async.ts:124](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L124)
 
 ***
 
@@ -855,7 +875,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:79](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L79)
+[packages/quickjs-ffi-types/src/ffi-async.ts:82](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L82)
 
 ***
 
@@ -875,7 +895,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:96](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L96)
+[packages/quickjs-ffi-types/src/ffi-async.ts:99](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L99)
 
 ***
 
@@ -895,7 +915,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:100](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L100)
+[packages/quickjs-ffi-types/src/ffi-async.ts:103](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L103)
 
 ***
 
@@ -909,7 +929,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:52](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L52)
+[packages/quickjs-ffi-types/src/ffi-async.ts:53](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L53)
 
 ***
 
@@ -923,7 +943,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:49](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L49)
+[packages/quickjs-ffi-types/src/ffi-async.ts:50](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L50)
 
 ***
 
@@ -947,7 +967,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:225](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L225)
+[packages/quickjs-ffi-types/src/ffi-async.ts:228](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L228)
 
 ***
 
@@ -967,7 +987,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:104](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L104)
+[packages/quickjs-ffi-types/src/ffi-async.ts:107](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L107)
 
 ***
 
@@ -985,7 +1005,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:105](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L105)
+[packages/quickjs-ffi-types/src/ffi-async.ts:108](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L108)
 
 ***
 
@@ -1003,7 +1023,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:70](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L70)
+[packages/quickjs-ffi-types/src/ffi-async.ts:73](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L73)
 
 ***
 
@@ -1025,7 +1045,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:71](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L71)
+[packages/quickjs-ffi-types/src/ffi-async.ts:74](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L74)
 
 ***
 
@@ -1045,7 +1065,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:55](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L55)
+[packages/quickjs-ffi-types/src/ffi-async.ts:58](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L58)
 
 ***
 
@@ -1063,7 +1083,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:42](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L42)
+[packages/quickjs-ffi-types/src/ffi-async.ts:43](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L43)
 
 ***
 
@@ -1083,29 +1103,53 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:76](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L76)
+[packages/quickjs-ffi-types/src/ffi-async.ts:79](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L79)
 
 ***
 
 ### QTS\_NewFunction
 
-> **QTS\_NewFunction**: (`ctx`, `func_id`, `name`) => [`JSValuePointer`](../exports.md#jsvaluepointer)
+> **QTS\_NewFunction**: (`ctx`, `name`, `arg_length`, `is_constructor`, `host_ref_id`) => [`JSValuePointer`](../exports.md#jsvaluepointer)
 
 #### Parameters
 
 • **ctx**: [`JSContextPointer`](../exports.md#jscontextpointer)
 
-• **func\_id**: `number`
-
 • **name**: `string`
 
+• **arg\_length**: `number`
+
+• **is\_constructor**: `boolean`
+
+• **host\_ref\_id**: `HostRefId`
+
 #### Returns
 
 [`JSValuePointer`](../exports.md#jsvaluepointer)
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:249](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L249)
+[packages/quickjs-ffi-types/src/ffi-async.ts:252](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L252)
+
+***
+
+### QTS\_NewHostRef
+
+> **QTS\_NewHostRef**: (`ctx`, `id`) => [`JSValuePointer`](../exports.md#jsvaluepointer)
+
+#### Parameters
+
+• **ctx**: [`JSContextPointer`](../exports.md#jscontextpointer)
+
+• **id**: `HostRefId`
+
+#### Returns
+
+[`JSValuePointer`](../exports.md#jsvaluepointer)
+
+#### Source
+
+[packages/quickjs-ffi-types/src/ffi-async.ts:54](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L54)
 
 ***
 
@@ -1123,7 +1167,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:65](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L65)
+[packages/quickjs-ffi-types/src/ffi-async.ts:68](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L68)
 
 ***
 
@@ -1143,7 +1187,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:66](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L66)
+[packages/quickjs-ffi-types/src/ffi-async.ts:69](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L69)
 
 ***
 
@@ -1163,7 +1207,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:232](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L232)
+[packages/quickjs-ffi-types/src/ffi-async.ts:235](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L235)
 
 ***
 
@@ -1177,7 +1221,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:53](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L53)
+[packages/quickjs-ffi-types/src/ffi-async.ts:56](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L56)
 
 ***
 
@@ -1197,7 +1241,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:78](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L78)
+[packages/quickjs-ffi-types/src/ffi-async.ts:81](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L81)
 
 ***
 
@@ -1219,7 +1263,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:91](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L91)
+[packages/quickjs-ffi-types/src/ffi-async.ts:94](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L94)
 
 ***
 
@@ -1239,7 +1283,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:240](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L240)
+[packages/quickjs-ffi-types/src/ffi-async.ts:243](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L243)
 
 ***
 
@@ -1259,7 +1303,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:236](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L236)
+[packages/quickjs-ffi-types/src/ffi-async.ts:239](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L239)
 
 ***
 
@@ -1273,7 +1317,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:46](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L46)
+[packages/quickjs-ffi-types/src/ffi-async.ts:47](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L47)
 
 ***
 
@@ -1293,7 +1337,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:187](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L187)
+[packages/quickjs-ffi-types/src/ffi-async.ts:190](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L190)
 
 ***
 
@@ -1313,7 +1357,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:44](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L44)
+[packages/quickjs-ffi-types/src/ffi-async.ts:45](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L45)
 
 ***
 
@@ -1331,7 +1375,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:255](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L255)
+[packages/quickjs-ffi-types/src/ffi-async.ts:264](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L264)
 
 ***
 
@@ -1349,7 +1393,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:257](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L257)
+[packages/quickjs-ffi-types/src/ffi-async.ts:266](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L266)
 
 ***
 
@@ -1367,7 +1411,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:45](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L45)
+[packages/quickjs-ffi-types/src/ffi-async.ts:46](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L46)
 
 ***
 
@@ -1385,7 +1429,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:254](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L254)
+[packages/quickjs-ffi-types/src/ffi-async.ts:263](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L263)
 
 ***
 
@@ -1405,7 +1449,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:256](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L256)
+[packages/quickjs-ffi-types/src/ffi-async.ts:265](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L265)
 
 ***
 
@@ -1425,7 +1469,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:48](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L48)
+[packages/quickjs-ffi-types/src/ffi-async.ts:49](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L49)
 
 ***
 
@@ -1445,7 +1489,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:43](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L43)
+[packages/quickjs-ffi-types/src/ffi-async.ts:44](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L44)
 
 ***
 
@@ -1465,7 +1509,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:246](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L246)
+[packages/quickjs-ffi-types/src/ffi-async.ts:249](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L249)
 
 ***
 
@@ -1489,7 +1533,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:136](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L136)
+[packages/quickjs-ffi-types/src/ffi-async.ts:139](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L139)
 
 ***
 
@@ -1513,7 +1557,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:142](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L142)
+[packages/quickjs-ffi-types/src/ffi-async.ts:145](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L145)
 
 ***
 
@@ -1531,7 +1575,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:244](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L244)
+[packages/quickjs-ffi-types/src/ffi-async.ts:247](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L247)
 
 ***
 
@@ -1551,7 +1595,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:41](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L41)
+[packages/quickjs-ffi-types/src/ffi-async.ts:42](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L42)
 
 ***
 
@@ -1571,7 +1615,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:216](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L216)
+[packages/quickjs-ffi-types/src/ffi-async.ts:219](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L219)
 
 ***
 
@@ -1591,7 +1635,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:262](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L262)
+[packages/quickjs-ffi-types/src/ffi-async.ts:271](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L271)
 
 ***
 
@@ -1611,7 +1655,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:258](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L258)
+[packages/quickjs-ffi-types/src/ffi-async.ts:267](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L267)
 
 ***
 
diff --git a/doc/@jitl/quickjs-ffi-types/interfaces/QuickJSEmscriptenModule.md b/doc/@jitl/quickjs-ffi-types/interfaces/QuickJSEmscriptenModule.md
index 84d6d2d0a..20ee3c107 100644
--- a/doc/@jitl/quickjs-ffi-types/interfaces/QuickJSEmscriptenModule.md
+++ b/doc/@jitl/quickjs-ffi-types/interfaces/QuickJSEmscriptenModule.md
@@ -55,7 +55,7 @@ QuickJS.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:168](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L168)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:169](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L169)
 
 ***
 
@@ -69,7 +69,7 @@ QuickJS.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:158](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L158)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:159](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L159)
 
 ***
 
@@ -83,7 +83,7 @@ QuickJS.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:159](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L159)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:160](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L160)
 
 ***
 
@@ -97,7 +97,7 @@ QuickJS.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:157](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L157)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:158](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L158)
 
 ***
 
@@ -111,7 +111,7 @@ QuickJS.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:163](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L163)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:164](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L164)
 
 ***
 
@@ -125,7 +125,7 @@ QuickJS.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:164](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L164)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:165](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L165)
 
 ***
 
@@ -139,7 +139,7 @@ QuickJS.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:161](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L161)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:162](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L162)
 
 ***
 
@@ -153,7 +153,7 @@ QuickJS.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:162](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L162)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:163](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L163)
 
 ***
 
@@ -167,7 +167,7 @@ QuickJS.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:160](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L160)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:161](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L161)
 
 ***
 
@@ -181,7 +181,7 @@ QuickJS.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:167](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L167)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:168](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L168)
 
 ***
 
@@ -195,7 +195,7 @@ QuickJS.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:166](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L166)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:167](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L167)
 
 ***
 
@@ -205,7 +205,7 @@ QuickJS.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:237](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L237)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:244](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L244)
 
 ***
 
@@ -215,7 +215,7 @@ QuickJS.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:236](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L236)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:243](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L243)
 
 ***
 
@@ -231,7 +231,7 @@ Compile this to WebAssembly.Module
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:104](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L104)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:105](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L105)
 
 ***
 
@@ -247,7 +247,7 @@ If provided, use this WebAssembly.Memory instead of an automatically created one
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:107](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L107)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:108](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L108)
 
 ## Methods
 
@@ -274,7 +274,7 @@ https://emscripten.org/docs/api_reference/preamble.js.html#UTF8ToString
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:144](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L144)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:145](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L145)
 
 ***
 
@@ -296,7 +296,7 @@ https://emscripten.org/docs/api_reference/preamble.js.html#UTF8ToString
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:148](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L148)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:149](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L149)
 
 ***
 
@@ -318,7 +318,7 @@ https://emscripten.org/docs/api_reference/preamble.js.html#UTF8ToString
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:147](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L147)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:148](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L148)
 
 ***
 
@@ -355,7 +355,7 @@ https://emscripten.org/docs/api_reference/preamble.js.html#UTF8ToString
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:149](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L149)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:150](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L150)
 
 ***
 
@@ -381,7 +381,7 @@ Create an instance of the WASM module, call onSuccess(instance), then return ins
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:110](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L110)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:111](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L111)
 
 ***
 
@@ -403,7 +403,7 @@ Create an instance of the WASM module, call onSuccess(instance), then return ins
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:145](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L145)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:146](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L146)
 
 ***
 
@@ -447,7 +447,7 @@ Often `''` (empty string)
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:97](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L97)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:98](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L98)
 
 ***
 
@@ -471,7 +471,7 @@ Called by emscripten as dependencies blocking initialization are added or fulfil
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:116](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L116)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:117](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L117)
 
 ***
 
@@ -500,7 +500,7 @@ https://emscripten.org/docs/api_reference/preamble.js.html#stringToUTF8
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:139](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L139)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:140](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L140)
 
 ***
 
diff --git a/doc/@jitl/quickjs-ffi-types/interfaces/QuickJSFFI.md b/doc/@jitl/quickjs-ffi-types/interfaces/QuickJSFFI.md
index eb92840e1..cfc55dbb1 100644
--- a/doc/@jitl/quickjs-ffi-types/interfaces/QuickJSFFI.md
+++ b/doc/@jitl/quickjs-ffi-types/interfaces/QuickJSFFI.md
@@ -37,6 +37,7 @@ library.
   - [QTS\_GetFalse](QuickJSFFI.md#qts-getfalse)
   - [QTS\_GetFloat64](QuickJSFFI.md#qts-getfloat64)
   - [QTS\_GetGlobalObject](QuickJSFFI.md#qts-getglobalobject)
+  - [QTS\_GetHostRefId](QuickJSFFI.md#qts-gethostrefid)
   - [QTS\_GetLength](QuickJSFFI.md#qts-getlength)
   - [QTS\_GetModuleNamespace](QuickJSFFI.md#qts-getmodulenamespace)
   - [QTS\_GetNull](QuickJSFFI.md#qts-getnull)
@@ -56,6 +57,7 @@ library.
   - [QTS\_NewError](QuickJSFFI.md#qts-newerror)
   - [QTS\_NewFloat64](QuickJSFFI.md#qts-newfloat64)
   - [QTS\_NewFunction](QuickJSFFI.md#qts-newfunction)
+  - [QTS\_NewHostRef](QuickJSFFI.md#qts-newhostref)
   - [QTS\_NewObject](QuickJSFFI.md#qts-newobject)
   - [QTS\_NewObjectProto](QuickJSFFI.md#qts-newobjectproto)
   - [QTS\_NewPromiseCapability](QuickJSFFI.md#qts-newpromisecapability)
@@ -96,7 +98,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi.ts:38](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L38)
+[packages/quickjs-ffi-types/src/ffi.ts:39](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L39)
 
 ***
 
@@ -116,7 +118,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi.ts:198](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L198)
+[packages/quickjs-ffi-types/src/ffi.ts:207](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L207)
 
 ***
 
@@ -130,7 +132,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi.ts:196](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L196)
+[packages/quickjs-ffi-types/src/ffi.ts:199](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L199)
 
 ***
 
@@ -144,7 +146,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi.ts:195](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L195)
+[packages/quickjs-ffi-types/src/ffi.ts:198](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L198)
 
 ***
 
@@ -158,7 +160,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi.ts:46](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L46)
+[packages/quickjs-ffi-types/src/ffi.ts:47](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L47)
 
 ***
 
@@ -184,7 +186,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi.ts:140](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L140)
+[packages/quickjs-ffi-types/src/ffi.ts:143](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L143)
 
 ***
 
@@ -218,7 +220,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi.ts:122](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L122)
+[packages/quickjs-ffi-types/src/ffi.ts:125](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L125)
 
 ***
 
@@ -238,7 +240,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi.ts:148](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L148)
+[packages/quickjs-ffi-types/src/ffi.ts:151](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L151)
 
 ***
 
@@ -258,7 +260,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi.ts:60](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L60)
+[packages/quickjs-ffi-types/src/ffi.ts:63](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L63)
 
 ***
 
@@ -286,7 +288,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi.ts:152](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L152)
+[packages/quickjs-ffi-types/src/ffi.ts:155](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L155)
 
 ***
 
@@ -308,7 +310,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi.ts:101](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L101)
+[packages/quickjs-ffi-types/src/ffi.ts:104](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L104)
 
 ***
 
@@ -328,7 +330,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi.ts:59](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L59)
+[packages/quickjs-ffi-types/src/ffi.ts:62](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L62)
 
 ***
 
@@ -346,7 +348,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi.ts:55](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L55)
+[packages/quickjs-ffi-types/src/ffi.ts:58](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L58)
 
 ***
 
@@ -364,7 +366,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi.ts:53](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L53)
+[packages/quickjs-ffi-types/src/ffi.ts:56](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L56)
 
 ***
 
@@ -384,7 +386,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi.ts:56](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L56)
+[packages/quickjs-ffi-types/src/ffi.ts:59](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L59)
 
 ***
 
@@ -404,7 +406,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi.ts:57](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L57)
+[packages/quickjs-ffi-types/src/ffi.ts:60](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L60)
 
 ***
 
@@ -424,7 +426,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi.ts:58](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L58)
+[packages/quickjs-ffi-types/src/ffi.ts:61](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L61)
 
 ***
 
@@ -444,7 +446,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi.ts:82](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L82)
+[packages/quickjs-ffi-types/src/ffi.ts:85](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L85)
 
 ***
 
@@ -464,7 +466,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi.ts:86](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L86)
+[packages/quickjs-ffi-types/src/ffi.ts:89](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L89)
 
 ***
 
@@ -482,7 +484,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi.ts:193](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L193)
+[packages/quickjs-ffi-types/src/ffi.ts:196](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L196)
 
 ***
 
@@ -496,7 +498,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi.ts:50](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L50)
+[packages/quickjs-ffi-types/src/ffi.ts:51](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L51)
 
 ***
 
@@ -516,7 +518,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi.ts:76](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L76)
+[packages/quickjs-ffi-types/src/ffi.ts:79](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L79)
 
 ***
 
@@ -534,7 +536,25 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi.ts:179](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L179)
+[packages/quickjs-ffi-types/src/ffi.ts:182](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L182)
+
+***
+
+### QTS\_GetHostRefId
+
+> **QTS\_GetHostRefId**: (`value`) => `HostRefId`
+
+#### Parameters
+
+• **value**: [`JSValuePointer`](../exports.md#jsvaluepointer) \| [`JSValueConstPointer`](../exports.md#jsvalueconstpointer)
+
+#### Returns
+
+`HostRefId`
+
+#### Source
+
+[packages/quickjs-ffi-types/src/ffi.ts:54](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L54)
 
 ***
 
@@ -556,7 +576,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi.ts:168](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L168)
+[packages/quickjs-ffi-types/src/ffi.ts:171](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L171)
 
 ***
 
@@ -576,7 +596,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi.ts:160](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L160)
+[packages/quickjs-ffi-types/src/ffi.ts:163](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L163)
 
 ***
 
@@ -590,7 +610,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi.ts:49](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L49)
+[packages/quickjs-ffi-types/src/ffi.ts:50](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L50)
 
 ***
 
@@ -616,7 +636,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi.ts:133](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L133)
+[packages/quickjs-ffi-types/src/ffi.ts:136](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L136)
 
 ***
 
@@ -638,7 +658,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi.ts:106](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L106)
+[packages/quickjs-ffi-types/src/ffi.ts:109](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L109)
 
 ***
 
@@ -660,7 +680,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi.ts:111](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L111)
+[packages/quickjs-ffi-types/src/ffi.ts:114](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L114)
 
 ***
 
@@ -680,7 +700,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi.ts:78](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L78)
+[packages/quickjs-ffi-types/src/ffi.ts:81](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L81)
 
 ***
 
@@ -700,7 +720,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi.ts:95](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L95)
+[packages/quickjs-ffi-types/src/ffi.ts:98](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L98)
 
 ***
 
@@ -714,7 +734,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi.ts:51](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L51)
+[packages/quickjs-ffi-types/src/ffi.ts:52](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L52)
 
 ***
 
@@ -728,7 +748,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi.ts:48](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L48)
+[packages/quickjs-ffi-types/src/ffi.ts:49](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L49)
 
 ***
 
@@ -752,7 +772,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi.ts:173](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L173)
+[packages/quickjs-ffi-types/src/ffi.ts:176](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L176)
 
 ***
 
@@ -772,7 +792,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi.ts:99](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L99)
+[packages/quickjs-ffi-types/src/ffi.ts:102](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L102)
 
 ***
 
@@ -790,7 +810,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi.ts:100](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L100)
+[packages/quickjs-ffi-types/src/ffi.ts:103](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L103)
 
 ***
 
@@ -808,7 +828,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi.ts:69](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L69)
+[packages/quickjs-ffi-types/src/ffi.ts:72](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L72)
 
 ***
 
@@ -830,7 +850,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi.ts:70](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L70)
+[packages/quickjs-ffi-types/src/ffi.ts:73](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L73)
 
 ***
 
@@ -850,7 +870,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi.ts:54](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L54)
+[packages/quickjs-ffi-types/src/ffi.ts:57](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L57)
 
 ***
 
@@ -868,7 +888,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi.ts:41](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L41)
+[packages/quickjs-ffi-types/src/ffi.ts:42](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L42)
 
 ***
 
@@ -888,29 +908,53 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi.ts:75](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L75)
+[packages/quickjs-ffi-types/src/ffi.ts:78](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L78)
 
 ***
 
 ### QTS\_NewFunction
 
-> **QTS\_NewFunction**: (`ctx`, `func_id`, `name`) => [`JSValuePointer`](../exports.md#jsvaluepointer)
+> **QTS\_NewFunction**: (`ctx`, `name`, `arg_length`, `is_constructor`, `host_ref_id`) => [`JSValuePointer`](../exports.md#jsvaluepointer)
 
 #### Parameters
 
 • **ctx**: [`JSContextPointer`](../exports.md#jscontextpointer)
 
-• **func\_id**: `number`
-
 • **name**: `string`
 
+• **arg\_length**: `number`
+
+• **is\_constructor**: `boolean`
+
+• **host\_ref\_id**: `HostRefId`
+
 #### Returns
 
 [`JSValuePointer`](../exports.md#jsvaluepointer)
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi.ts:197](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L197)
+[packages/quickjs-ffi-types/src/ffi.ts:200](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L200)
+
+***
+
+### QTS\_NewHostRef
+
+> **QTS\_NewHostRef**: (`ctx`, `id`) => [`JSValuePointer`](../exports.md#jsvaluepointer)
+
+#### Parameters
+
+• **ctx**: [`JSContextPointer`](../exports.md#jscontextpointer)
+
+• **id**: `HostRefId`
+
+#### Returns
+
+[`JSValuePointer`](../exports.md#jsvaluepointer)
+
+#### Source
+
+[packages/quickjs-ffi-types/src/ffi.ts:53](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L53)
 
 ***
 
@@ -928,7 +972,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi.ts:64](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L64)
+[packages/quickjs-ffi-types/src/ffi.ts:67](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L67)
 
 ***
 
@@ -948,7 +992,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi.ts:65](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L65)
+[packages/quickjs-ffi-types/src/ffi.ts:68](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L68)
 
 ***
 
@@ -968,7 +1012,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi.ts:180](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L180)
+[packages/quickjs-ffi-types/src/ffi.ts:183](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L183)
 
 ***
 
@@ -982,7 +1026,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi.ts:52](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L52)
+[packages/quickjs-ffi-types/src/ffi.ts:55](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L55)
 
 ***
 
@@ -1002,7 +1046,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi.ts:77](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L77)
+[packages/quickjs-ffi-types/src/ffi.ts:80](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L80)
 
 ***
 
@@ -1024,7 +1068,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi.ts:90](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L90)
+[packages/quickjs-ffi-types/src/ffi.ts:93](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L93)
 
 ***
 
@@ -1044,7 +1088,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi.ts:188](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L188)
+[packages/quickjs-ffi-types/src/ffi.ts:191](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L191)
 
 ***
 
@@ -1064,7 +1108,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi.ts:184](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L184)
+[packages/quickjs-ffi-types/src/ffi.ts:187](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L187)
 
 ***
 
@@ -1078,7 +1122,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi.ts:45](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L45)
+[packages/quickjs-ffi-types/src/ffi.ts:46](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L46)
 
 ***
 
@@ -1098,7 +1142,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi.ts:147](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L147)
+[packages/quickjs-ffi-types/src/ffi.ts:150](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L150)
 
 ***
 
@@ -1118,7 +1162,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi.ts:43](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L43)
+[packages/quickjs-ffi-types/src/ffi.ts:44](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L44)
 
 ***
 
@@ -1136,7 +1180,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi.ts:203](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L203)
+[packages/quickjs-ffi-types/src/ffi.ts:212](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L212)
 
 ***
 
@@ -1154,7 +1198,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi.ts:205](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L205)
+[packages/quickjs-ffi-types/src/ffi.ts:214](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L214)
 
 ***
 
@@ -1172,7 +1216,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi.ts:44](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L44)
+[packages/quickjs-ffi-types/src/ffi.ts:45](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L45)
 
 ***
 
@@ -1190,7 +1234,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi.ts:202](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L202)
+[packages/quickjs-ffi-types/src/ffi.ts:211](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L211)
 
 ***
 
@@ -1210,7 +1254,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi.ts:204](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L204)
+[packages/quickjs-ffi-types/src/ffi.ts:213](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L213)
 
 ***
 
@@ -1230,7 +1274,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi.ts:47](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L47)
+[packages/quickjs-ffi-types/src/ffi.ts:48](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L48)
 
 ***
 
@@ -1250,7 +1294,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi.ts:42](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L42)
+[packages/quickjs-ffi-types/src/ffi.ts:43](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L43)
 
 ***
 
@@ -1270,7 +1314,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi.ts:194](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L194)
+[packages/quickjs-ffi-types/src/ffi.ts:197](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L197)
 
 ***
 
@@ -1294,7 +1338,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi.ts:116](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L116)
+[packages/quickjs-ffi-types/src/ffi.ts:119](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L119)
 
 ***
 
@@ -1312,7 +1356,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi.ts:192](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L192)
+[packages/quickjs-ffi-types/src/ffi.ts:195](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L195)
 
 ***
 
@@ -1332,7 +1376,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi.ts:40](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L40)
+[packages/quickjs-ffi-types/src/ffi.ts:41](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L41)
 
 ***
 
@@ -1352,7 +1396,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi.ts:164](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L164)
+[packages/quickjs-ffi-types/src/ffi.ts:167](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L167)
 
 ***
 
@@ -1372,7 +1416,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi.ts:210](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L210)
+[packages/quickjs-ffi-types/src/ffi.ts:219](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L219)
 
 ***
 
@@ -1392,7 +1436,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi.ts:206](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L206)
+[packages/quickjs-ffi-types/src/ffi.ts:215](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L215)
 
 ***
 
diff --git a/doc/@jitl/quickjs-ffi-types/interfaces/SourceMapData.md b/doc/@jitl/quickjs-ffi-types/interfaces/SourceMapData.md
index 5e00f16e2..1214491cb 100644
--- a/doc/@jitl/quickjs-ffi-types/interfaces/SourceMapData.md
+++ b/doc/@jitl/quickjs-ffi-types/interfaces/SourceMapData.md
@@ -22,7 +22,7 @@
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:58](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L58)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:59](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L59)
 
 ***
 
@@ -32,7 +32,7 @@
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:57](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L57)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:58](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L58)
 
 ***
 
@@ -42,7 +42,7 @@
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:56](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L56)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:57](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L57)
 
 ***
 
@@ -52,7 +52,7 @@
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:55](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L55)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:56](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L56)
 
 ***
 
diff --git a/doc/quickjs-emscripten-core/classes/Lifetime.md b/doc/quickjs-emscripten-core/classes/Lifetime.md
index c88e8f5a9..a5597c673 100644
--- a/doc/quickjs-emscripten-core/classes/Lifetime.md
+++ b/doc/quickjs-emscripten-core/classes/Lifetime.md
@@ -32,6 +32,7 @@ Typically, quickjs-emscripten uses Lifetimes to protect C memory pointers.
   - [value](Lifetime.md#value)
 - [Methods](Lifetime.md#methods)
   - [`[dispose]`()](Lifetime.md#dispose)
+  - [assertAlive()](Lifetime.md#assertalive)
   - [consume()](Lifetime.md#consume)
   - [dispose()](Lifetime.md#dispose)
   - [dup()](Lifetime.md#dup)
@@ -258,6 +259,20 @@ Just calls the standard .dispose() method of this class.
 
 ***
 
+### assertAlive()
+
+> **`protected`** **assertAlive**(): `void`
+
+#### Returns
+
+`void`
+
+#### Source
+
+[packages/quickjs-emscripten-core/src/lifetime.ts:182](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/lifetime.ts#L182)
+
+***
+
 ### consume()
 
 #### consume(map)
diff --git a/doc/quickjs-emscripten-core/classes/QuickJSAsyncContext.md b/doc/quickjs-emscripten-core/classes/QuickJSAsyncContext.md
index 754d4bc92..5fae5fcc7 100644
--- a/doc/quickjs-emscripten-core/classes/QuickJSAsyncContext.md
+++ b/doc/quickjs-emscripten-core/classes/QuickJSAsyncContext.md
@@ -54,8 +54,11 @@ host functions as though they were synchronous.
   - [newArrayBuffer()](QuickJSAsyncContext.md#newarraybuffer)
   - [newAsyncifiedFunction()](QuickJSAsyncContext.md#newasyncifiedfunction)
   - [newBigInt()](QuickJSAsyncContext.md#newbigint)
+  - [newConstructorFunction()](QuickJSAsyncContext.md#newconstructorfunction)
   - [newError()](QuickJSAsyncContext.md#newerror)
   - [newFunction()](QuickJSAsyncContext.md#newfunction)
+  - [newFunctionWithOptions()](QuickJSAsyncContext.md#newfunctionwithoptions)
+  - [newHostRef()](QuickJSAsyncContext.md#newhostref)
   - [newNumber()](QuickJSAsyncContext.md#newnumber)
   - [newObject()](QuickJSAsyncContext.md#newobject)
   - [newPromise()](QuickJSAsyncContext.md#newpromise)
@@ -68,7 +71,9 @@ host functions as though they were synchronous.
   - [setProp()](QuickJSAsyncContext.md#setprop)
   - [success()](QuickJSAsyncContext.md#success)
   - [throw()](QuickJSAsyncContext.md#throw)
+  - [toHostRef()](QuickJSAsyncContext.md#tohostref)
   - [typeof()](QuickJSAsyncContext.md#typeof)
+  - [unwrapHostRef()](QuickJSAsyncContext.md#unwraphostref)
   - [unwrapResult()](QuickJSAsyncContext.md#unwrapresult)
 
 ## Extends
@@ -112,7 +117,7 @@ to create a new QuickJSContext.
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:224](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L224)
+[packages/quickjs-emscripten-core/src/context.ts:233](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L233)
 
 ## Properties
 
@@ -146,7 +151,7 @@ false after the object has been [dispose](QuickJSAsyncContext.md#dispose-1)d
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:255](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L255)
+[packages/quickjs-emscripten-core/src/context.ts:264](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L264)
 
 ***
 
@@ -162,7 +167,7 @@ false after the object has been [dispose](QuickJSAsyncContext.md#dispose-1)d
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:313](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L313)
+[packages/quickjs-emscripten-core/src/context.ts:322](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L322)
 
 ***
 
@@ -180,7 +185,7 @@ You can set properties to create global variables.
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:328](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L328)
+[packages/quickjs-emscripten-core/src/context.ts:337](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L337)
 
 ***
 
@@ -196,7 +201,7 @@ You can set properties to create global variables.
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:287](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L287)
+[packages/quickjs-emscripten-core/src/context.ts:296](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L296)
 
 ***
 
@@ -212,7 +217,7 @@ You can set properties to create global variables.
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:300](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L300)
+[packages/quickjs-emscripten-core/src/context.ts:309](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L309)
 
 ***
 
@@ -228,7 +233,7 @@ You can set properties to create global variables.
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:274](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L274)
+[packages/quickjs-emscripten-core/src/context.ts:283](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L283)
 
 ## Methods
 
@@ -298,7 +303,7 @@ console.log(context.dump(resultHandle)) // 42
 
 ##### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:1059](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L1059)
+[packages/quickjs-emscripten-core/src/context.ts:1180](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L1180)
 
 #### callFunction(func, thisVal, args)
 
@@ -322,7 +327,7 @@ console.log(context.dump(resultHandle)) // 42
 
 ##### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:1064](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L1064)
+[packages/quickjs-emscripten-core/src/context.ts:1185](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L1185)
 
 ***
 
@@ -356,7 +361,7 @@ value.
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:1113](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L1113)
+[packages/quickjs-emscripten-core/src/context.ts:1234](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L1234)
 
 ***
 
@@ -389,7 +394,7 @@ socket.on("data", chunk => {
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:1431](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L1431)
+[packages/quickjs-emscripten-core/src/context.ts:1530](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L1530)
 
 ***
 
@@ -420,7 +425,7 @@ Javascript string or number (which will be converted automatically to a JSValue)
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:1000](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L1000)
+[packages/quickjs-emscripten-core/src/context.ts:1121](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L1121)
 
 ***
 
@@ -445,7 +450,7 @@ will result in an error.
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:265](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L265)
+[packages/quickjs-emscripten-core/src/context.ts:274](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L274)
 
 ***
 
@@ -471,7 +476,7 @@ Returns `handle.toString()` if it cannot be serialized to JSON.
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:1234](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L1234)
+[packages/quickjs-emscripten-core/src/context.ts:1355](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L1355)
 
 ***
 
@@ -505,7 +510,7 @@ socket.write(dataLifetime?.value)
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:1414](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L1414)
+[packages/quickjs-emscripten-core/src/context.ts:1513](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L1513)
 
 ***
 
@@ -532,7 +537,7 @@ See [Equality comparisons and sameness](https://developer.mozilla.org/en-US/docs
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:811](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L811)
+[packages/quickjs-emscripten-core/src/context.ts:932](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L932)
 
 ***
 
@@ -595,7 +600,7 @@ interrupted, the error will have name `InternalError` and message
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:1156](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L1156)
+[packages/quickjs-emscripten-core/src/context.ts:1277](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L1277)
 
 ***
 
@@ -643,7 +648,7 @@ See [EvalFlags](../exports.md#evalflags) for number semantics
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:1440](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L1440)
+[packages/quickjs-emscripten-core/src/context.ts:1539](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L1539)
 
 ***
 
@@ -667,7 +672,7 @@ Coverts `handle` to a JavaScript ArrayBuffer
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:690](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L690)
+[packages/quickjs-emscripten-core/src/context.ts:811](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L811)
 
 ***
 
@@ -691,7 +696,7 @@ Converts `handle` to a Javascript bigint.
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:681](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L681)
+[packages/quickjs-emscripten-core/src/context.ts:802](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L802)
 
 ***
 
@@ -727,7 +732,7 @@ for (using entriesHandle of context.getIterator(mapHandle).unwrap()) {
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:960](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L960)
+[packages/quickjs-emscripten-core/src/context.ts:1081](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L1081)
 
 ***
 
@@ -762,7 +767,7 @@ a number if the handle has a numeric length property, otherwise `undefined`.
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:870](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L870)
+[packages/quickjs-emscripten-core/src/context.ts:991](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L991)
 
 ***
 
@@ -788,7 +793,7 @@ Converts `handle` into a Javascript number.
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:652](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L652)
+[packages/quickjs-emscripten-core/src/context.ts:773](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L773)
 
 ***
 
@@ -842,7 +847,7 @@ QuickJSEmptyGetOwnPropertyNames if no options are set.
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:907](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L907)
+[packages/quickjs-emscripten-core/src/context.ts:1028](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L1028)
 
 ***
 
@@ -876,7 +881,7 @@ resultHandle.dispose();
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:715](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L715)
+[packages/quickjs-emscripten-core/src/context.ts:836](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L836)
 
 ***
 
@@ -906,7 +911,7 @@ Javascript string (which will be converted automatically).
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:840](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L840)
+[packages/quickjs-emscripten-core/src/context.ts:961](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L961)
 
 ***
 
@@ -930,7 +935,7 @@ Converts `handle` to a Javascript string.
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:660](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L660)
+[packages/quickjs-emscripten-core/src/context.ts:781](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L781)
 
 ***
 
@@ -955,7 +960,7 @@ registry in the guest, it will be created with Symbol.for on the host.
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:669](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L669)
+[packages/quickjs-emscripten-core/src/context.ts:790](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L790)
 
 ***
 
@@ -979,7 +984,7 @@ Access a well-known symbol that is a property of the global Symbol object, like
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:388](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L388)
+[packages/quickjs-emscripten-core/src/context.ts:397](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L397)
 
 ***
 
@@ -1000,7 +1005,7 @@ Create a new QuickJS [array](https://developer.mozilla.org/en-US/docs/Web/JavaSc
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:430](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L430)
+[packages/quickjs-emscripten-core/src/context.ts:439](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L439)
 
 ***
 
@@ -1024,7 +1029,7 @@ Create a new QuickJS [ArrayBuffer](https://developer.mozilla.org/en-US/docs/Web/
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:438](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L438)
+[packages/quickjs-emscripten-core/src/context.ts:447](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L447)
 
 ***
 
@@ -1080,7 +1085,56 @@ Create a QuickJS [bigint](https://developer.mozilla.org/en-US/docs/Web/JavaScrip
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:396](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L396)
+[packages/quickjs-emscripten-core/src/context.ts:405](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L405)
+
+***
+
+### newConstructorFunction()
+
+#### newConstructorFunction(fn)
+
+> **newConstructorFunction**(`fn`): [`QuickJSHandle`](../exports.md#quickjshandle)
+
+Convert a Javascript function into a QuickJS constructor function.
+See [newFunction](QuickJSAsyncContext.md#newfunction) for more details.
+
+##### Parameters
+
+• **fn**: [`VmFunctionImplementation`](../exports.md#vmfunctionimplementationvmhandle)\<[`QuickJSHandle`](../exports.md#quickjshandle)\>
+
+##### Returns
+
+[`QuickJSHandle`](../exports.md#quickjshandle)
+
+##### Inherited from
+
+[`quickjs-emscripten-core.QuickJSContext.newConstructorFunction`](QuickJSContext.md#newconstructorfunction)
+
+##### Source
+
+[packages/quickjs-emscripten-core/src/context.ts:635](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L635)
+
+#### newConstructorFunction(name, fn)
+
+> **newConstructorFunction**(`name`, `fn`): [`QuickJSHandle`](../exports.md#quickjshandle)
+
+##### Parameters
+
+• **name**: `undefined` \| `string`
+
+• **fn**: [`VmFunctionImplementation`](../exports.md#vmfunctionimplementationvmhandle)\<[`QuickJSHandle`](../exports.md#quickjshandle)\>
+
+##### Returns
+
+[`QuickJSHandle`](../exports.md#quickjshandle)
+
+##### Inherited from
+
+[`quickjs-emscripten-core.QuickJSContext.newConstructorFunction`](QuickJSContext.md#newconstructorfunction)
+
+##### Source
+
+[packages/quickjs-emscripten-core/src/context.ts:636](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L636)
 
 ***
 
@@ -1108,7 +1162,7 @@ Create a QuickJS [bigint](https://developer.mozilla.org/en-US/docs/Web/JavaScrip
 
 ##### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:607](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L607)
+[packages/quickjs-emscripten-core/src/context.ts:679](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L679)
 
 #### newError(message)
 
@@ -1128,7 +1182,7 @@ Create a QuickJS [bigint](https://developer.mozilla.org/en-US/docs/Web/JavaScrip
 
 ##### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:608](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L608)
+[packages/quickjs-emscripten-core/src/context.ts:680](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L680)
 
 #### newError(undefined)
 
@@ -1144,13 +1198,15 @@ Create a QuickJS [bigint](https://developer.mozilla.org/en-US/docs/Web/JavaScrip
 
 ##### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:609](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L609)
+[packages/quickjs-emscripten-core/src/context.ts:681](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L681)
 
 ***
 
 ### newFunction()
 
-> **newFunction**(`name`, `fn`): [`QuickJSHandle`](../exports.md#quickjshandle)
+#### newFunction(fn)
+
+> **newFunction**(`fn`): [`QuickJSHandle`](../exports.md#quickjshandle)
 
 Convert a Javascript function into a QuickJS function value.
 See [VmFunctionImplementation](../exports.md#vmfunctionimplementationvmhandle) for more details.
@@ -1159,6 +1215,8 @@ A [VmFunctionImplementation](../exports.md#vmfunctionimplementationvmhandle) sho
 value. A VmFunctionImplementation should also not retain any references to
 its return value.
 
+For constructors (functions that will be called with `new ...`), use [newConstructorFunction](QuickJSAsyncContext.md#newconstructorfunction).
+
 The function argument handles are automatically disposed when the function
 returns. If you want to retain a handle beyond the end of the function, you
 can call [Lifetime#dup](Lifetime.md#dup) to create a copy of the handle that you own
@@ -1245,23 +1303,110 @@ someNativeAsyncFunction().then(deferred.resolve)
 return deferred.handle
 ```
 
-#### Parameters
+##### Parameters
 
-• **name**: `string`
+• **fn**: [`VmFunctionImplementation`](../exports.md#vmfunctionimplementationvmhandle)\<[`QuickJSHandle`](../exports.md#quickjshandle)\>
+
+##### Returns
+
+[`QuickJSHandle`](../exports.md#quickjshandle)
+
+##### Inherited from
+
+[`quickjs-emscripten-core.QuickJSContext.newFunction`](QuickJSContext.md#newfunction)
+
+##### Source
+
+[packages/quickjs-emscripten-core/src/context.ts:612](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L612)
+
+#### newFunction(name, fn)
+
+> **newFunction**(`name`, `fn`): [`QuickJSHandle`](../exports.md#quickjshandle)
+
+##### Parameters
+
+• **name**: `undefined` \| `string`
 
 • **fn**: [`VmFunctionImplementation`](../exports.md#vmfunctionimplementationvmhandle)\<[`QuickJSHandle`](../exports.md#quickjshandle)\>
 
+##### Returns
+
+[`QuickJSHandle`](../exports.md#quickjshandle)
+
+##### Inherited from
+
+[`quickjs-emscripten-core.QuickJSContext.newFunction`](QuickJSContext.md#newfunction)
+
+##### Source
+
+[packages/quickjs-emscripten-core/src/context.ts:613](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L613)
+
+***
+
+### newFunctionWithOptions()
+
+> **newFunctionWithOptions**(`args`): [`QuickJSHandle`](../exports.md#quickjshandle)
+
+Lower-level API for creating functions.
+See [newFunction](QuickJSAsyncContext.md#newfunction) for more details on how to use functions.
+
+#### Parameters
+
+• **args**: `Object`
+
+• **args\.fn**: [`VmFunctionImplementation`](../exports.md#vmfunctionimplementationvmhandle)\<[`QuickJSHandle`](../exports.md#quickjshandle)\>
+
+• **args\.isConstructor**: `boolean`
+
+• **args\.length**: `number`
+
+• **args\.name**: `undefined` \| `string`
+
 #### Returns
 
 [`QuickJSHandle`](../exports.md#quickjshandle)
 
 #### Inherited from
 
-[`quickjs-emscripten-core.QuickJSContext.newFunction`](QuickJSContext.md#newfunction)
+[`quickjs-emscripten-core.QuickJSContext.newFunctionWithOptions`](QuickJSContext.md#newfunctionwithoptions)
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:601](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L601)
+[packages/quickjs-emscripten-core/src/context.ts:661](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L661)
+
+***
+
+### newHostRef()
+
+> **newHostRef**\<`T`\>(`value`): `HostRef`\<`T`\>
+
+Create an opaque handle object that stores a reference to a host JavaScript object.
+
+The guest cannot access the host object directly, but you may use
+getHostRef to convert a HostRef handle back into a HostRef`<T>`  from
+inside a function implementation.
+
+You must call [HostRef#dispose]([object Object]) or otherwise consume the [HostRef#handle]([object Object]) to ensure the handle is not leaked.
+
+#### Type parameters
+
+• **T** extends `object`
+
+#### Parameters
+
+• **value**: `T`
+
+#### Returns
+
+`HostRef`\<`T`\>
+
+#### Inherited from
+
+[`quickjs-emscripten-core.QuickJSContext.newHostRef`](QuickJSContext.md#newhostref)
+
+#### Source
+
+[packages/quickjs-emscripten-core/src/context.ts:716](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L716)
 
 ***
 
@@ -1285,7 +1430,7 @@ Converts a Javascript number into a QuickJS value.
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:347](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L347)
+[packages/quickjs-emscripten-core/src/context.ts:356](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L356)
 
 ***
 
@@ -1312,7 +1457,7 @@ Like [`Object.create`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/R
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:416](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L416)
+[packages/quickjs-emscripten-core/src/context.ts:425](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L425)
 
 ***
 
@@ -1337,7 +1482,7 @@ resources; see the documentation on [QuickJSDeferredPromise](QuickJSDeferredProm
 
 ##### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:451](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L451)
+[packages/quickjs-emscripten-core/src/context.ts:460](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L460)
 
 #### newPromise(promise)
 
@@ -1363,7 +1508,7 @@ You can still resolve/reject the created promise "early" using its methods.
 
 ##### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:459](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L459)
+[packages/quickjs-emscripten-core/src/context.ts:468](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L468)
 
 #### newPromise(newPromiseFn)
 
@@ -1388,7 +1533,7 @@ You can still resolve/reject the created promise "early" using its methods.
 
 ##### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:466](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L466)
+[packages/quickjs-emscripten-core/src/context.ts:475](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L475)
 
 ***
 
@@ -1412,7 +1557,7 @@ Create a QuickJS [string](https://developer.mozilla.org/en-US/docs/Web/JavaScrip
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:354](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L354)
+[packages/quickjs-emscripten-core/src/context.ts:363](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L363)
 
 ***
 
@@ -1437,7 +1582,7 @@ All symbols created with the same key will be the same value.
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:377](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L377)
+[packages/quickjs-emscripten-core/src/context.ts:386](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L386)
 
 ***
 
@@ -1462,7 +1607,7 @@ No two symbols created with this function will be the same value.
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:365](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L365)
+[packages/quickjs-emscripten-core/src/context.ts:374](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L374)
 
 ***
 
@@ -1494,7 +1639,7 @@ You may need to call [runtime](QuickJSAsyncContext.md#runtime).[QuickJSRuntime#e
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:754](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L754)
+[packages/quickjs-emscripten-core/src/context.ts:875](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L875)
 
 ***
 
@@ -1521,7 +1666,7 @@ See [Equality comparisons and sameness](https://developer.mozilla.org/en-US/docs
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:819](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L819)
+[packages/quickjs-emscripten-core/src/context.ts:940](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L940)
 
 ***
 
@@ -1548,7 +1693,7 @@ See [Equality comparisons and sameness](https://developer.mozilla.org/en-US/docs
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:827](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L827)
+[packages/quickjs-emscripten-core/src/context.ts:948](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L948)
 
 ***
 
@@ -1585,7 +1730,7 @@ properties.
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:985](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L985)
+[packages/quickjs-emscripten-core/src/context.ts:1106](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L1106)
 
 ***
 
@@ -1611,7 +1756,7 @@ properties.
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:1436](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L1436)
+[packages/quickjs-emscripten-core/src/context.ts:1535](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L1535)
 
 ***
 
@@ -1635,7 +1780,37 @@ Throw an error in the VM, interrupted whatever current execution is in progress
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:1193](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L1193)
+[packages/quickjs-emscripten-core/src/context.ts:1314](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L1314)
+
+***
+
+### toHostRef()
+
+> **toHostRef**\<`T`\>(`handle`): `undefined` \| `HostRef`\<`T`\>
+
+If `handle` is a `HostRef<T>.handle`, return a new `HostRef<T>` instance wrapping the handle.
+
+You must call [HostRef#dispose]([object Object]) or otherwise consume the [HostRef#handle]([object Object]) to ensure the handle is not leaked.
+
+#### Type parameters
+
+• **T** extends `object`
+
+#### Parameters
+
+• **handle**: [`QuickJSHandle`](../exports.md#quickjshandle)
+
+#### Returns
+
+`undefined` \| `HostRef`\<`T`\>
+
+#### Inherited from
+
+[`quickjs-emscripten-core.QuickJSContext.toHostRef`](QuickJSContext.md#tohostref)
+
+#### Source
+
+[packages/quickjs-emscripten-core/src/context.ts:732](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L732)
 
 ***
 
@@ -1663,7 +1838,39 @@ Does not support BigInt values correctly.
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:643](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L643)
+[packages/quickjs-emscripten-core/src/context.ts:764](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L764)
+
+***
+
+### unwrapHostRef()
+
+> **unwrapHostRef**\<`T`\>(`handle`): `T`
+
+If `handle` is a `HostRef<T>.handle`, return the host value `T`.
+
+#### Type parameters
+
+• **T** extends `object`
+
+#### Parameters
+
+• **handle**: [`QuickJSHandle`](../exports.md#quickjshandle)
+
+#### Returns
+
+`T`
+
+#### Inherited from
+
+[`quickjs-emscripten-core.QuickJSContext.unwrapHostRef`](QuickJSContext.md#unwraphostref)
+
+#### Throws
+
+QuickJSHostRefInvalid if `handle` is not a `HostRef<T>.handle`
+
+#### Source
+
+[packages/quickjs-emscripten-core/src/context.ts:747](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L747)
 
 ***
 
@@ -1694,7 +1901,7 @@ If the result is an error, converts the error to a native object and throws the
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:1277](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L1277)
+[packages/quickjs-emscripten-core/src/context.ts:1398](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L1398)
 
 ***
 
diff --git a/doc/quickjs-emscripten-core/classes/QuickJSAsyncRuntime.md b/doc/quickjs-emscripten-core/classes/QuickJSAsyncRuntime.md
index d6c4945f1..e20bdd5fa 100644
--- a/doc/quickjs-emscripten-core/classes/QuickJSAsyncRuntime.md
+++ b/doc/quickjs-emscripten-core/classes/QuickJSAsyncRuntime.md
@@ -96,7 +96,7 @@ false after the object has been [dispose](QuickJSAsyncRuntime.md#dispose-1)d
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/runtime.ts:125](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/runtime.ts#L125)
+[packages/quickjs-emscripten-core/src/runtime.ts:128](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/runtime.ts#L128)
 
 ## Methods
 
@@ -144,7 +144,7 @@ QuickJSWrongOwner if owned by a different runtime.
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/runtime.ts:327](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/runtime.ts#L327)
+[packages/quickjs-emscripten-core/src/runtime.ts:330](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/runtime.ts#L330)
 
 ***
 
@@ -168,7 +168,7 @@ For a human-digestible representation, see [dumpMemoryUsage](QuickJSAsyncRuntime
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/runtime.ts:296](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/runtime.ts#L296)
+[packages/quickjs-emscripten-core/src/runtime.ts:299](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/runtime.ts#L299)
 
 ***
 
@@ -195,7 +195,7 @@ manipulation if debug logging is disabled.
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/runtime.ts:363](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/runtime.ts#L363)
+[packages/quickjs-emscripten-core/src/runtime.ts:366](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/runtime.ts#L366)
 
 ***
 
@@ -215,7 +215,7 @@ Dispose of the underlying resources used by this object.
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/runtime.ts:129](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/runtime.ts#L129)
+[packages/quickjs-emscripten-core/src/runtime.ts:132](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/runtime.ts#L132)
 
 ***
 
@@ -236,7 +236,7 @@ For programmatic access to this information, see [computeMemoryUsage](QuickJSAsy
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/runtime.ts:307](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/runtime.ts#L307)
+[packages/quickjs-emscripten-core/src/runtime.ts:310](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/runtime.ts#L310)
 
 ***
 
@@ -274,7 +274,7 @@ functions or rejected promises. Those errors are available by calling
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/runtime.ts:243](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/runtime.ts#L243)
+[packages/quickjs-emscripten-core/src/runtime.ts:246](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/runtime.ts#L246)
 
 ***
 
@@ -297,7 +297,7 @@ true if there is at least one pendingJob queued up.
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/runtime.ts:194](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/runtime.ts#L194)
+[packages/quickjs-emscripten-core/src/runtime.ts:197](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/runtime.ts#L197)
 
 ***
 
@@ -317,7 +317,7 @@ true if debug logging is enabled
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/runtime.ts:353](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/runtime.ts#L353)
+[packages/quickjs-emscripten-core/src/runtime.ts:356](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/runtime.ts#L356)
 
 ***
 
@@ -366,7 +366,7 @@ See [setInterruptHandler](QuickJSAsyncRuntime.md#setinterrupthandler).
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/runtime.ts:219](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/runtime.ts#L219)
+[packages/quickjs-emscripten-core/src/runtime.ts:222](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/runtime.ts#L222)
 
 ***
 
@@ -386,7 +386,7 @@ Remove the the loader set by [setModuleLoader](QuickJSAsyncRuntime.md#setmodulel
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/runtime.ts:181](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/runtime.ts#L181)
+[packages/quickjs-emscripten-core/src/runtime.ts:184](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/runtime.ts#L184)
 
 ***
 
@@ -413,7 +413,7 @@ code.
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/runtime.ts:343](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/runtime.ts#L343)
+[packages/quickjs-emscripten-core/src/runtime.ts:346](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/runtime.ts#L346)
 
 ***
 
@@ -441,7 +441,7 @@ The interrupt handler can be removed with [removeInterruptHandler](QuickJSAsyncR
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/runtime.ts:207](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/runtime.ts#L207)
+[packages/quickjs-emscripten-core/src/runtime.ts:210](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/runtime.ts#L210)
 
 ***
 
@@ -494,7 +494,7 @@ To remove the limit, set to `-1`.
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/runtime.ts:281](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/runtime.ts#L281)
+[packages/quickjs-emscripten-core/src/runtime.ts:284](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/runtime.ts#L284)
 
 ***
 
diff --git a/doc/quickjs-emscripten-core/classes/QuickJSAsyncWASMModule.md b/doc/quickjs-emscripten-core/classes/QuickJSAsyncWASMModule.md
index 1ef31647f..c13cc25ab 100644
--- a/doc/quickjs-emscripten-core/classes/QuickJSAsyncWASMModule.md
+++ b/doc/quickjs-emscripten-core/classes/QuickJSAsyncWASMModule.md
@@ -104,7 +104,7 @@ and provide the [CustomizeVariantOptions#wasmMemory](../interfaces/CustomizeVari
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/module.ts:426](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/module.ts#L426)
+[packages/quickjs-emscripten-core/src/module.ts:441](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/module.ts#L441)
 
 ***
 
diff --git a/doc/quickjs-emscripten-core/classes/QuickJSContext.md b/doc/quickjs-emscripten-core/classes/QuickJSContext.md
index bf3f1ad76..848fc634a 100644
--- a/doc/quickjs-emscripten-core/classes/QuickJSContext.md
+++ b/doc/quickjs-emscripten-core/classes/QuickJSContext.md
@@ -77,8 +77,11 @@ See [QuickJSRuntime](QuickJSRuntime.md) for more information.
   - [newArray()](QuickJSContext.md#newarray)
   - [newArrayBuffer()](QuickJSContext.md#newarraybuffer)
   - [newBigInt()](QuickJSContext.md#newbigint)
+  - [newConstructorFunction()](QuickJSContext.md#newconstructorfunction)
   - [newError()](QuickJSContext.md#newerror)
   - [newFunction()](QuickJSContext.md#newfunction)
+  - [newFunctionWithOptions()](QuickJSContext.md#newfunctionwithoptions)
+  - [newHostRef()](QuickJSContext.md#newhostref)
   - [newNumber()](QuickJSContext.md#newnumber)
   - [newObject()](QuickJSContext.md#newobject)
   - [newPromise()](QuickJSContext.md#newpromise)
@@ -91,7 +94,9 @@ See [QuickJSRuntime](QuickJSRuntime.md) for more information.
   - [setProp()](QuickJSContext.md#setprop)
   - [success()](QuickJSContext.md#success)
   - [throw()](QuickJSContext.md#throw)
+  - [toHostRef()](QuickJSContext.md#tohostref)
   - [typeof()](QuickJSContext.md#typeof)
+  - [unwrapHostRef()](QuickJSContext.md#unwraphostref)
   - [unwrapResult()](QuickJSContext.md#unwrapresult)
 
 ## Extends
@@ -140,7 +145,7 @@ to create a new QuickJSContext.
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:224](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L224)
+[packages/quickjs-emscripten-core/src/context.ts:233](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L233)
 
 ## Properties
 
@@ -152,7 +157,7 @@ The runtime that created this context.
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:186](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L186)
+[packages/quickjs-emscripten-core/src/context.ts:195](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L195)
 
 ## Accessors
 
@@ -170,7 +175,7 @@ false after the object has been [dispose](QuickJSContext.md#dispose-1)d
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:255](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L255)
+[packages/quickjs-emscripten-core/src/context.ts:264](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L264)
 
 ***
 
@@ -186,7 +191,7 @@ false after the object has been [dispose](QuickJSContext.md#dispose-1)d
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:313](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L313)
+[packages/quickjs-emscripten-core/src/context.ts:322](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L322)
 
 ***
 
@@ -204,7 +209,7 @@ You can set properties to create global variables.
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:328](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L328)
+[packages/quickjs-emscripten-core/src/context.ts:337](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L337)
 
 ***
 
@@ -220,7 +225,7 @@ You can set properties to create global variables.
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:287](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L287)
+[packages/quickjs-emscripten-core/src/context.ts:296](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L296)
 
 ***
 
@@ -236,7 +241,7 @@ You can set properties to create global variables.
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:300](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L300)
+[packages/quickjs-emscripten-core/src/context.ts:309](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L309)
 
 ***
 
@@ -252,7 +257,7 @@ You can set properties to create global variables.
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:274](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L274)
+[packages/quickjs-emscripten-core/src/context.ts:283](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L283)
 
 ## Methods
 
@@ -326,7 +331,7 @@ console.log(context.dump(resultHandle)) // 42
 
 ##### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:1059](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L1059)
+[packages/quickjs-emscripten-core/src/context.ts:1180](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L1180)
 
 #### callFunction(func, thisVal, args)
 
@@ -350,7 +355,7 @@ console.log(context.dump(resultHandle)) // 42
 
 ##### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:1064](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L1064)
+[packages/quickjs-emscripten-core/src/context.ts:1185](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L1185)
 
 ***
 
@@ -380,7 +385,7 @@ value.
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:1113](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L1113)
+[packages/quickjs-emscripten-core/src/context.ts:1234](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L1234)
 
 ***
 
@@ -409,7 +414,7 @@ socket.on("data", chunk => {
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:1431](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L1431)
+[packages/quickjs-emscripten-core/src/context.ts:1530](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L1530)
 
 ***
 
@@ -440,7 +445,7 @@ Javascript string or number (which will be converted automatically to a JSValue)
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:1000](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L1000)
+[packages/quickjs-emscripten-core/src/context.ts:1121](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L1121)
 
 ***
 
@@ -469,7 +474,7 @@ will result in an error.
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:265](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L265)
+[packages/quickjs-emscripten-core/src/context.ts:274](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L274)
 
 ***
 
@@ -491,7 +496,7 @@ Returns `handle.toString()` if it cannot be serialized to JSON.
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:1234](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L1234)
+[packages/quickjs-emscripten-core/src/context.ts:1355](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L1355)
 
 ***
 
@@ -521,7 +526,7 @@ socket.write(dataLifetime?.value)
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:1414](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L1414)
+[packages/quickjs-emscripten-core/src/context.ts:1513](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L1513)
 
 ***
 
@@ -544,7 +549,7 @@ See [Equality comparisons and sameness](https://developer.mozilla.org/en-US/docs
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:811](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L811)
+[packages/quickjs-emscripten-core/src/context.ts:932](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L932)
 
 ***
 
@@ -607,7 +612,7 @@ interrupted, the error will have name `InternalError` and message
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:1156](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L1156)
+[packages/quickjs-emscripten-core/src/context.ts:1277](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L1277)
 
 ***
 
@@ -625,7 +630,7 @@ interrupted, the error will have name `InternalError` and message
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:1440](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L1440)
+[packages/quickjs-emscripten-core/src/context.ts:1539](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L1539)
 
 ***
 
@@ -645,7 +650,7 @@ Coverts `handle` to a JavaScript ArrayBuffer
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:690](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L690)
+[packages/quickjs-emscripten-core/src/context.ts:811](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L811)
 
 ***
 
@@ -665,7 +670,7 @@ Converts `handle` to a Javascript bigint.
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:681](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L681)
+[packages/quickjs-emscripten-core/src/context.ts:802](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L802)
 
 ***
 
@@ -697,7 +702,7 @@ for (using entriesHandle of context.getIterator(mapHandle).unwrap()) {
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:960](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L960)
+[packages/quickjs-emscripten-core/src/context.ts:1081](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L1081)
 
 ***
 
@@ -728,7 +733,7 @@ a number if the handle has a numeric length property, otherwise `undefined`.
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:870](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L870)
+[packages/quickjs-emscripten-core/src/context.ts:991](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L991)
 
 ***
 
@@ -754,7 +759,7 @@ Converts `handle` into a Javascript number.
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:652](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L652)
+[packages/quickjs-emscripten-core/src/context.ts:773](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L773)
 
 ***
 
@@ -804,7 +809,7 @@ QuickJSEmptyGetOwnPropertyNames if no options are set.
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:907](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L907)
+[packages/quickjs-emscripten-core/src/context.ts:1028](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L1028)
 
 ***
 
@@ -834,7 +839,7 @@ resultHandle.dispose();
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:715](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L715)
+[packages/quickjs-emscripten-core/src/context.ts:836](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L836)
 
 ***
 
@@ -864,7 +869,7 @@ Javascript string (which will be converted automatically).
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:840](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L840)
+[packages/quickjs-emscripten-core/src/context.ts:961](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L961)
 
 ***
 
@@ -888,7 +893,7 @@ Converts `handle` to a Javascript string.
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:660](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L660)
+[packages/quickjs-emscripten-core/src/context.ts:781](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L781)
 
 ***
 
@@ -909,7 +914,7 @@ registry in the guest, it will be created with Symbol.for on the host.
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:669](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L669)
+[packages/quickjs-emscripten-core/src/context.ts:790](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L790)
 
 ***
 
@@ -929,7 +934,7 @@ Access a well-known symbol that is a property of the global Symbol object, like
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:388](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L388)
+[packages/quickjs-emscripten-core/src/context.ts:397](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L397)
 
 ***
 
@@ -946,7 +951,7 @@ Create a new QuickJS [array](https://developer.mozilla.org/en-US/docs/Web/JavaSc
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:430](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L430)
+[packages/quickjs-emscripten-core/src/context.ts:439](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L439)
 
 ***
 
@@ -966,7 +971,7 @@ Create a new QuickJS [ArrayBuffer](https://developer.mozilla.org/en-US/docs/Web/
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:438](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L438)
+[packages/quickjs-emscripten-core/src/context.ts:447](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L447)
 
 ***
 
@@ -986,7 +991,48 @@ Create a QuickJS [bigint](https://developer.mozilla.org/en-US/docs/Web/JavaScrip
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:396](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L396)
+[packages/quickjs-emscripten-core/src/context.ts:405](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L405)
+
+***
+
+### newConstructorFunction()
+
+#### newConstructorFunction(fn)
+
+> **newConstructorFunction**(`fn`): [`QuickJSHandle`](../exports.md#quickjshandle)
+
+Convert a Javascript function into a QuickJS constructor function.
+See [newFunction](QuickJSContext.md#newfunction) for more details.
+
+##### Parameters
+
+• **fn**: [`VmFunctionImplementation`](../exports.md#vmfunctionimplementationvmhandle)\<[`QuickJSHandle`](../exports.md#quickjshandle)\>
+
+##### Returns
+
+[`QuickJSHandle`](../exports.md#quickjshandle)
+
+##### Source
+
+[packages/quickjs-emscripten-core/src/context.ts:635](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L635)
+
+#### newConstructorFunction(name, fn)
+
+> **newConstructorFunction**(`name`, `fn`): [`QuickJSHandle`](../exports.md#quickjshandle)
+
+##### Parameters
+
+• **name**: `undefined` \| `string`
+
+• **fn**: [`VmFunctionImplementation`](../exports.md#vmfunctionimplementationvmhandle)\<[`QuickJSHandle`](../exports.md#quickjshandle)\>
+
+##### Returns
+
+[`QuickJSHandle`](../exports.md#quickjshandle)
+
+##### Source
+
+[packages/quickjs-emscripten-core/src/context.ts:636](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L636)
 
 ***
 
@@ -1010,7 +1056,7 @@ Create a QuickJS [bigint](https://developer.mozilla.org/en-US/docs/Web/JavaScrip
 
 ##### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:607](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L607)
+[packages/quickjs-emscripten-core/src/context.ts:679](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L679)
 
 #### newError(message)
 
@@ -1026,7 +1072,7 @@ Create a QuickJS [bigint](https://developer.mozilla.org/en-US/docs/Web/JavaScrip
 
 ##### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:608](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L608)
+[packages/quickjs-emscripten-core/src/context.ts:680](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L680)
 
 #### newError(undefined)
 
@@ -1038,13 +1084,15 @@ Create a QuickJS [bigint](https://developer.mozilla.org/en-US/docs/Web/JavaScrip
 
 ##### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:609](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L609)
+[packages/quickjs-emscripten-core/src/context.ts:681](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L681)
 
 ***
 
 ### newFunction()
 
-> **newFunction**(`name`, `fn`): [`QuickJSHandle`](../exports.md#quickjshandle)
+#### newFunction(fn)
+
+> **newFunction**(`fn`): [`QuickJSHandle`](../exports.md#quickjshandle)
 
 Convert a Javascript function into a QuickJS function value.
 See [VmFunctionImplementation](../exports.md#vmfunctionimplementationvmhandle) for more details.
@@ -1053,6 +1101,8 @@ A [VmFunctionImplementation](../exports.md#vmfunctionimplementationvmhandle) sho
 value. A VmFunctionImplementation should also not retain any references to
 its return value.
 
+For constructors (functions that will be called with `new ...`), use [newConstructorFunction](QuickJSContext.md#newconstructorfunction).
+
 The function argument handles are automatically disposed when the function
 returns. If you want to retain a handle beyond the end of the function, you
 can call [Lifetime#dup](Lifetime.md#dup) to create a copy of the handle that you own
@@ -1139,23 +1189,102 @@ someNativeAsyncFunction().then(deferred.resolve)
 return deferred.handle
 ```
 
-#### Parameters
+##### Parameters
 
-• **name**: `string`
+• **fn**: [`VmFunctionImplementation`](../exports.md#vmfunctionimplementationvmhandle)\<[`QuickJSHandle`](../exports.md#quickjshandle)\>
+
+##### Returns
+
+[`QuickJSHandle`](../exports.md#quickjshandle)
+
+##### Implementation of
+
+[`quickjs-emscripten-core.LowLevelJavascriptVm.newFunction`](../interfaces/LowLevelJavascriptVm.md#newfunction)
+
+##### Source
+
+[packages/quickjs-emscripten-core/src/context.ts:612](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L612)
+
+#### newFunction(name, fn)
+
+> **newFunction**(`name`, `fn`): [`QuickJSHandle`](../exports.md#quickjshandle)
+
+##### Parameters
+
+• **name**: `undefined` \| `string`
 
 • **fn**: [`VmFunctionImplementation`](../exports.md#vmfunctionimplementationvmhandle)\<[`QuickJSHandle`](../exports.md#quickjshandle)\>
 
+##### Returns
+
+[`QuickJSHandle`](../exports.md#quickjshandle)
+
+##### Implementation of
+
+`LowLevelJavascriptVm.newFunction`
+
+##### Source
+
+[packages/quickjs-emscripten-core/src/context.ts:613](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L613)
+
+***
+
+### newFunctionWithOptions()
+
+> **newFunctionWithOptions**(`args`): [`QuickJSHandle`](../exports.md#quickjshandle)
+
+Lower-level API for creating functions.
+See [newFunction](QuickJSContext.md#newfunction) for more details on how to use functions.
+
+#### Parameters
+
+• **args**: `Object`
+
+• **args\.fn**: [`VmFunctionImplementation`](../exports.md#vmfunctionimplementationvmhandle)\<[`QuickJSHandle`](../exports.md#quickjshandle)\>
+
+• **args\.isConstructor**: `boolean`
+
+• **args\.length**: `number`
+
+• **args\.name**: `undefined` \| `string`
+
 #### Returns
 
 [`QuickJSHandle`](../exports.md#quickjshandle)
 
-#### Implementation of
+#### Source
 
-[`quickjs-emscripten-core.LowLevelJavascriptVm.newFunction`](../interfaces/LowLevelJavascriptVm.md#newfunction)
+[packages/quickjs-emscripten-core/src/context.ts:661](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L661)
+
+***
+
+### newHostRef()
+
+> **newHostRef**\<`T`\>(`value`): `HostRef`\<`T`\>
+
+Create an opaque handle object that stores a reference to a host JavaScript object.
+
+The guest cannot access the host object directly, but you may use
+getHostRef to convert a HostRef handle back into a HostRef`<T>`  from
+inside a function implementation.
+
+You must call [HostRef#dispose]([object Object]) or otherwise consume the [HostRef#handle]([object Object]) to ensure the handle is not leaked.
+
+#### Type parameters
+
+• **T** extends `object`
+
+#### Parameters
+
+• **value**: `T`
+
+#### Returns
+
+`HostRef`\<`T`\>
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:601](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L601)
+[packages/quickjs-emscripten-core/src/context.ts:716](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L716)
 
 ***
 
@@ -1179,7 +1308,7 @@ Converts a Javascript number into a QuickJS value.
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:347](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L347)
+[packages/quickjs-emscripten-core/src/context.ts:356](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L356)
 
 ***
 
@@ -1206,7 +1335,7 @@ Like [`Object.create`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/R
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:416](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L416)
+[packages/quickjs-emscripten-core/src/context.ts:425](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L425)
 
 ***
 
@@ -1227,7 +1356,7 @@ resources; see the documentation on [QuickJSDeferredPromise](QuickJSDeferredProm
 
 ##### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:451](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L451)
+[packages/quickjs-emscripten-core/src/context.ts:460](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L460)
 
 #### newPromise(promise)
 
@@ -1249,7 +1378,7 @@ You can still resolve/reject the created promise "early" using its methods.
 
 ##### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:459](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L459)
+[packages/quickjs-emscripten-core/src/context.ts:468](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L468)
 
 #### newPromise(newPromiseFn)
 
@@ -1270,7 +1399,7 @@ You can still resolve/reject the created promise "early" using its methods.
 
 ##### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:466](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L466)
+[packages/quickjs-emscripten-core/src/context.ts:475](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L475)
 
 ***
 
@@ -1294,7 +1423,7 @@ Create a QuickJS [string](https://developer.mozilla.org/en-US/docs/Web/JavaScrip
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:354](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L354)
+[packages/quickjs-emscripten-core/src/context.ts:363](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L363)
 
 ***
 
@@ -1315,7 +1444,7 @@ All symbols created with the same key will be the same value.
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:377](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L377)
+[packages/quickjs-emscripten-core/src/context.ts:386](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L386)
 
 ***
 
@@ -1336,7 +1465,7 @@ No two symbols created with this function will be the same value.
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:365](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L365)
+[packages/quickjs-emscripten-core/src/context.ts:374](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L374)
 
 ***
 
@@ -1364,7 +1493,7 @@ You may need to call [runtime](QuickJSContext.md#runtime).[QuickJSRuntime#execut
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:754](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L754)
+[packages/quickjs-emscripten-core/src/context.ts:875](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L875)
 
 ***
 
@@ -1387,7 +1516,7 @@ See [Equality comparisons and sameness](https://developer.mozilla.org/en-US/docs
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:819](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L819)
+[packages/quickjs-emscripten-core/src/context.ts:940](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L940)
 
 ***
 
@@ -1410,7 +1539,7 @@ See [Equality comparisons and sameness](https://developer.mozilla.org/en-US/docs
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:827](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L827)
+[packages/quickjs-emscripten-core/src/context.ts:948](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L948)
 
 ***
 
@@ -1447,7 +1576,7 @@ properties.
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:985](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L985)
+[packages/quickjs-emscripten-core/src/context.ts:1106](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L1106)
 
 ***
 
@@ -1469,7 +1598,7 @@ properties.
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:1436](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L1436)
+[packages/quickjs-emscripten-core/src/context.ts:1535](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L1535)
 
 ***
 
@@ -1489,7 +1618,33 @@ Throw an error in the VM, interrupted whatever current execution is in progress
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:1193](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L1193)
+[packages/quickjs-emscripten-core/src/context.ts:1314](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L1314)
+
+***
+
+### toHostRef()
+
+> **toHostRef**\<`T`\>(`handle`): `undefined` \| `HostRef`\<`T`\>
+
+If `handle` is a `HostRef<T>.handle`, return a new `HostRef<T>` instance wrapping the handle.
+
+You must call [HostRef#dispose]([object Object]) or otherwise consume the [HostRef#handle]([object Object]) to ensure the handle is not leaked.
+
+#### Type parameters
+
+• **T** extends `object`
+
+#### Parameters
+
+• **handle**: [`QuickJSHandle`](../exports.md#quickjshandle)
+
+#### Returns
+
+`undefined` \| `HostRef`\<`T`\>
+
+#### Source
+
+[packages/quickjs-emscripten-core/src/context.ts:732](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L732)
 
 ***
 
@@ -1517,7 +1672,35 @@ Does not support BigInt values correctly.
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:643](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L643)
+[packages/quickjs-emscripten-core/src/context.ts:764](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L764)
+
+***
+
+### unwrapHostRef()
+
+> **unwrapHostRef**\<`T`\>(`handle`): `T`
+
+If `handle` is a `HostRef<T>.handle`, return the host value `T`.
+
+#### Type parameters
+
+• **T** extends `object`
+
+#### Parameters
+
+• **handle**: [`QuickJSHandle`](../exports.md#quickjshandle)
+
+#### Returns
+
+`T`
+
+#### Throws
+
+QuickJSHostRefInvalid if `handle` is not a `HostRef<T>.handle`
+
+#### Source
+
+[packages/quickjs-emscripten-core/src/context.ts:747](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L747)
 
 ***
 
@@ -1544,7 +1727,7 @@ If the result is an error, converts the error to a native object and throws the
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:1277](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L1277)
+[packages/quickjs-emscripten-core/src/context.ts:1398](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L1398)
 
 ***
 
diff --git a/doc/quickjs-emscripten-core/classes/QuickJSRuntime.md b/doc/quickjs-emscripten-core/classes/QuickJSRuntime.md
index f8bf2eff6..b53d42af0 100644
--- a/doc/quickjs-emscripten-core/classes/QuickJSRuntime.md
+++ b/doc/quickjs-emscripten-core/classes/QuickJSRuntime.md
@@ -79,7 +79,7 @@ A context here may be allocated if one is needed by the runtime, eg for [compute
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/runtime.ts:78](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/runtime.ts#L78)
+[packages/quickjs-emscripten-core/src/runtime.ts:79](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/runtime.ts#L79)
 
 ## Accessors
 
@@ -97,7 +97,7 @@ false after the object has been [dispose](QuickJSRuntime.md#dispose-1)d
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/runtime.ts:125](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/runtime.ts#L125)
+[packages/quickjs-emscripten-core/src/runtime.ts:128](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/runtime.ts#L128)
 
 ## Methods
 
@@ -145,7 +145,7 @@ QuickJSWrongOwner if owned by a different runtime.
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/runtime.ts:327](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/runtime.ts#L327)
+[packages/quickjs-emscripten-core/src/runtime.ts:330](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/runtime.ts#L330)
 
 ***
 
@@ -165,7 +165,7 @@ For a human-digestible representation, see [dumpMemoryUsage](QuickJSRuntime.md#d
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/runtime.ts:296](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/runtime.ts#L296)
+[packages/quickjs-emscripten-core/src/runtime.ts:299](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/runtime.ts#L299)
 
 ***
 
@@ -188,7 +188,7 @@ manipulation if debug logging is disabled.
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/runtime.ts:363](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/runtime.ts#L363)
+[packages/quickjs-emscripten-core/src/runtime.ts:366](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/runtime.ts#L366)
 
 ***
 
@@ -212,7 +212,7 @@ Dispose of the underlying resources used by this object.
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/runtime.ts:129](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/runtime.ts#L129)
+[packages/quickjs-emscripten-core/src/runtime.ts:132](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/runtime.ts#L132)
 
 ***
 
@@ -229,7 +229,7 @@ For programmatic access to this information, see [computeMemoryUsage](QuickJSRun
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/runtime.ts:307](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/runtime.ts#L307)
+[packages/quickjs-emscripten-core/src/runtime.ts:310](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/runtime.ts#L310)
 
 ***
 
@@ -263,7 +263,7 @@ functions or rejected promises. Those errors are available by calling
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/runtime.ts:243](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/runtime.ts#L243)
+[packages/quickjs-emscripten-core/src/runtime.ts:246](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/runtime.ts#L246)
 
 ***
 
@@ -282,7 +282,7 @@ true if there is at least one pendingJob queued up.
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/runtime.ts:194](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/runtime.ts#L194)
+[packages/quickjs-emscripten-core/src/runtime.ts:197](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/runtime.ts#L197)
 
 ***
 
@@ -298,7 +298,7 @@ true if debug logging is enabled
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/runtime.ts:353](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/runtime.ts#L353)
+[packages/quickjs-emscripten-core/src/runtime.ts:356](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/runtime.ts#L356)
 
 ***
 
@@ -322,7 +322,7 @@ You should dispose a created context before disposing this runtime.
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/runtime.ts:140](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/runtime.ts#L140)
+[packages/quickjs-emscripten-core/src/runtime.ts:143](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/runtime.ts#L143)
 
 ***
 
@@ -339,7 +339,7 @@ See [setInterruptHandler](QuickJSRuntime.md#setinterrupthandler).
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/runtime.ts:219](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/runtime.ts#L219)
+[packages/quickjs-emscripten-core/src/runtime.ts:222](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/runtime.ts#L222)
 
 ***
 
@@ -355,7 +355,7 @@ Remove the the loader set by [setModuleLoader](QuickJSRuntime.md#setmoduleloader
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/runtime.ts:181](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/runtime.ts#L181)
+[packages/quickjs-emscripten-core/src/runtime.ts:184](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/runtime.ts#L184)
 
 ***
 
@@ -378,7 +378,7 @@ code.
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/runtime.ts:343](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/runtime.ts#L343)
+[packages/quickjs-emscripten-core/src/runtime.ts:346](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/runtime.ts#L346)
 
 ***
 
@@ -402,7 +402,7 @@ The interrupt handler can be removed with [removeInterruptHandler](QuickJSRuntim
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/runtime.ts:207](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/runtime.ts#L207)
+[packages/quickjs-emscripten-core/src/runtime.ts:210](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/runtime.ts#L210)
 
 ***
 
@@ -423,7 +423,7 @@ To remove the limit, set to `0`.
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/runtime.ts:315](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/runtime.ts#L315)
+[packages/quickjs-emscripten-core/src/runtime.ts:318](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/runtime.ts#L318)
 
 ***
 
@@ -444,7 +444,7 @@ To remove the limit, set to `-1`.
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/runtime.ts:281](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/runtime.ts#L281)
+[packages/quickjs-emscripten-core/src/runtime.ts:284](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/runtime.ts#L284)
 
 ***
 
@@ -469,7 +469,7 @@ The loader can be removed with [removeModuleLoader](QuickJSRuntime.md#removemodu
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/runtime.ts:172](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/runtime.ts#L172)
+[packages/quickjs-emscripten-core/src/runtime.ts:175](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/runtime.ts#L175)
 
 ***
 
diff --git a/doc/quickjs-emscripten-core/classes/QuickJSWASMModule.md b/doc/quickjs-emscripten-core/classes/QuickJSWASMModule.md
index bd3c82cd1..69abf2e94 100644
--- a/doc/quickjs-emscripten-core/classes/QuickJSWASMModule.md
+++ b/doc/quickjs-emscripten-core/classes/QuickJSWASMModule.md
@@ -81,7 +81,7 @@ with name `"InternalError"` and  message `"interrupted"`.
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/module.ts:395](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/module.ts#L395)
+[packages/quickjs-emscripten-core/src/module.ts:410](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/module.ts#L410)
 
 ***
 
@@ -101,7 +101,7 @@ and provide the [CustomizeVariantOptions#wasmMemory](../interfaces/CustomizeVari
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/module.ts:426](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/module.ts#L426)
+[packages/quickjs-emscripten-core/src/module.ts:441](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/module.ts#L441)
 
 ***
 
@@ -123,7 +123,7 @@ be disposed when the context is disposed.
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/module.ts:360](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/module.ts#L360)
+[packages/quickjs-emscripten-core/src/module.ts:375](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/module.ts#L375)
 
 ***
 
@@ -145,7 +145,7 @@ loading for one or more [QuickJSContext](QuickJSContext.md)s inside the runtime.
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/module.ts:333](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/module.ts#L333)
+[packages/quickjs-emscripten-core/src/module.ts:346](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/module.ts#L346)
 
 ***
 
diff --git a/doc/quickjs-emscripten-core/classes/StaticLifetime.md b/doc/quickjs-emscripten-core/classes/StaticLifetime.md
index 97d17214d..2d044895e 100644
--- a/doc/quickjs-emscripten-core/classes/StaticLifetime.md
+++ b/doc/quickjs-emscripten-core/classes/StaticLifetime.md
@@ -28,6 +28,7 @@ A Lifetime that lives forever. Used for constants.
   - [value](StaticLifetime.md#value)
 - [Methods](StaticLifetime.md#methods)
   - [`[dispose]`()](StaticLifetime.md#dispose)
+  - [assertAlive()](StaticLifetime.md#assertalive)
   - [consume()](StaticLifetime.md#consume)
   - [dispose()](StaticLifetime.md#dispose)
   - [dup()](StaticLifetime.md#dup)
@@ -257,6 +258,24 @@ Just calls the standard .dispose() method of this class.
 
 ***
 
+### assertAlive()
+
+> **`protected`** **assertAlive**(): `void`
+
+#### Returns
+
+`void`
+
+#### Inherited from
+
+[`quickjs-emscripten-core.Lifetime.assertAlive`](Lifetime.md#assertalive)
+
+#### Source
+
+[packages/quickjs-emscripten-core/src/lifetime.ts:182](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/lifetime.ts#L182)
+
+***
+
 ### consume()
 
 #### consume(map)
diff --git a/doc/quickjs-emscripten-core/classes/WeakLifetime.md b/doc/quickjs-emscripten-core/classes/WeakLifetime.md
index 089cf48fe..a8b3abc95 100644
--- a/doc/quickjs-emscripten-core/classes/WeakLifetime.md
+++ b/doc/quickjs-emscripten-core/classes/WeakLifetime.md
@@ -32,6 +32,7 @@ Used for function arguments.
   - [value](WeakLifetime.md#value)
 - [Methods](WeakLifetime.md#methods)
   - [`[dispose]`()](WeakLifetime.md#dispose)
+  - [assertAlive()](WeakLifetime.md#assertalive)
   - [consume()](WeakLifetime.md#consume)
   - [dispose()](WeakLifetime.md#dispose)
   - [dup()](WeakLifetime.md#dup)
@@ -267,6 +268,24 @@ Just calls the standard .dispose() method of this class.
 
 ***
 
+### assertAlive()
+
+> **`protected`** **assertAlive**(): `void`
+
+#### Returns
+
+`void`
+
+#### Inherited from
+
+[`quickjs-emscripten-core.Lifetime.assertAlive`](Lifetime.md#assertalive)
+
+#### Source
+
+[packages/quickjs-emscripten-core/src/lifetime.ts:182](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/lifetime.ts#L182)
+
+***
+
 ### consume()
 
 #### consume(map)
diff --git a/doc/quickjs-emscripten-core/exports.md b/doc/quickjs-emscripten-core/exports.md
index 51df2323f..fc4489e51 100644
--- a/doc/quickjs-emscripten-core/exports.md
+++ b/doc/quickjs-emscripten-core/exports.md
@@ -215,7 +215,7 @@ An `Array` that also implements [Disposable](interfaces/Disposable.md):
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:246](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L246)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:253](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L253)
 
 ***
 
@@ -231,7 +231,7 @@ by the runtime.
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/runtime.ts:35](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/runtime.ts#L35)
+[packages/quickjs-emscripten-core/src/runtime.ts:36](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/runtime.ts#L36)
 
 ***
 
@@ -256,7 +256,7 @@ Determines if a VM's execution should be interrupted.
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/runtime.ts:27](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/runtime.ts#L27)
+[packages/quickjs-emscripten-core/src/runtime.ts:28](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/runtime.ts#L28)
 
 ***
 
@@ -472,7 +472,7 @@ State of a promise.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-types.ts:131](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-types.ts#L131)
+[packages/quickjs-ffi-types/src/ffi-types.ts:136](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-types.ts#L136)
 
 ***
 
@@ -733,7 +733,7 @@ Property key for getting or setting a property on a handle with
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:68](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L68)
+[packages/quickjs-emscripten-core/src/context.ts:71](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L71)
 
 ***
 
@@ -1141,7 +1141,7 @@ Bitfield options for QTS_NewContext intrinsics
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-types.ts:131](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-types.ts#L131)
+[packages/quickjs-ffi-types/src/ffi-types.ts:136](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-types.ts#L136)
 
 ## Functions
 
@@ -1174,7 +1174,7 @@ Bitfield options for QTS_NewContext intrinsics
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-types.ts:136](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-types.ts#L136)
+[packages/quickjs-ffi-types/src/ffi-types.ts:141](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-types.ts#L141)
 
 ***
 
diff --git a/doc/quickjs-emscripten-core/interfaces/EmscriptenModule.md b/doc/quickjs-emscripten-core/interfaces/EmscriptenModule.md
index b92006021..d39bcb7d7 100644
--- a/doc/quickjs-emscripten-core/interfaces/EmscriptenModule.md
+++ b/doc/quickjs-emscripten-core/interfaces/EmscriptenModule.md
@@ -49,7 +49,7 @@ QuickJS.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:168](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L168)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:169](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L169)
 
 ***
 
@@ -59,7 +59,7 @@ QuickJS.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:158](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L158)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:159](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L159)
 
 ***
 
@@ -69,7 +69,7 @@ QuickJS.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:159](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L159)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:160](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L160)
 
 ***
 
@@ -79,7 +79,7 @@ QuickJS.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:157](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L157)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:158](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L158)
 
 ***
 
@@ -89,7 +89,7 @@ QuickJS.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:163](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L163)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:164](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L164)
 
 ***
 
@@ -99,7 +99,7 @@ QuickJS.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:164](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L164)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:165](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L165)
 
 ***
 
@@ -109,7 +109,7 @@ QuickJS.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:161](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L161)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:162](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L162)
 
 ***
 
@@ -119,7 +119,7 @@ QuickJS.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:162](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L162)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:163](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L163)
 
 ***
 
@@ -129,7 +129,7 @@ QuickJS.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:160](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L160)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:161](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L161)
 
 ***
 
@@ -139,7 +139,7 @@ QuickJS.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:167](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L167)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:168](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L168)
 
 ***
 
@@ -149,7 +149,7 @@ QuickJS.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:166](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L166)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:167](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L167)
 
 ***
 
@@ -165,7 +165,7 @@ Compile this to WebAssembly.Module
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:104](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L104)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:105](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L105)
 
 ***
 
@@ -181,7 +181,7 @@ If provided, use this WebAssembly.Memory instead of an automatically created one
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:107](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L107)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:108](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L108)
 
 ## Methods
 
@@ -204,7 +204,7 @@ https://emscripten.org/docs/api_reference/preamble.js.html#UTF8ToString
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:144](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L144)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:145](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L145)
 
 ***
 
@@ -222,7 +222,7 @@ https://emscripten.org/docs/api_reference/preamble.js.html#UTF8ToString
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:148](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L148)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:149](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L149)
 
 ***
 
@@ -240,7 +240,7 @@ https://emscripten.org/docs/api_reference/preamble.js.html#UTF8ToString
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:147](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L147)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:148](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L148)
 
 ***
 
@@ -273,7 +273,7 @@ https://emscripten.org/docs/api_reference/preamble.js.html#UTF8ToString
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:149](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L149)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:150](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L150)
 
 ***
 
@@ -299,7 +299,7 @@ Create an instance of the WASM module, call onSuccess(instance), then return ins
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:110](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L110)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:111](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L111)
 
 ***
 
@@ -317,7 +317,7 @@ Create an instance of the WASM module, call onSuccess(instance), then return ins
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:145](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L145)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:146](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L146)
 
 ***
 
@@ -361,7 +361,7 @@ Often `''` (empty string)
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:97](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L97)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:98](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L98)
 
 ***
 
@@ -385,7 +385,7 @@ Called by emscripten as dependencies blocking initialization are added or fulfil
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:116](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L116)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:117](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L117)
 
 ***
 
@@ -410,7 +410,7 @@ https://emscripten.org/docs/api_reference/preamble.js.html#stringToUTF8
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:139](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L139)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:140](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L140)
 
 ***
 
diff --git a/doc/quickjs-emscripten-core/interfaces/EmscriptenModuleLoader.md b/doc/quickjs-emscripten-core/interfaces/EmscriptenModuleLoader.md
index e31d5f435..89d140fbc 100644
--- a/doc/quickjs-emscripten-core/interfaces/EmscriptenModuleLoader.md
+++ b/doc/quickjs-emscripten-core/interfaces/EmscriptenModuleLoader.md
@@ -22,7 +22,7 @@
 
 ## Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:249](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L249)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:256](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L256)
 
 ***
 
diff --git a/doc/quickjs-emscripten-core/interfaces/EmscriptenModuleLoaderOptions.md b/doc/quickjs-emscripten-core/interfaces/EmscriptenModuleLoaderOptions.md
index c8e525b5d..ff70822f0 100644
--- a/doc/quickjs-emscripten-core/interfaces/EmscriptenModuleLoaderOptions.md
+++ b/doc/quickjs-emscripten-core/interfaces/EmscriptenModuleLoaderOptions.md
@@ -35,7 +35,7 @@ Compile this to WebAssembly.Module
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:104](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L104)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:105](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L105)
 
 ***
 
@@ -47,7 +47,7 @@ If provided, use this WebAssembly.Memory instead of an automatically created one
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:107](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L107)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:108](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L108)
 
 ## Methods
 
@@ -69,7 +69,7 @@ Create an instance of the WASM module, call onSuccess(instance), then return ins
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:110](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L110)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:111](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L111)
 
 ***
 
@@ -109,7 +109,7 @@ Often `''` (empty string)
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:97](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L97)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:98](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L98)
 
 ***
 
@@ -129,7 +129,7 @@ Called by emscripten as dependencies blocking initialization are added or fulfil
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:116](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L116)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:117](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L117)
 
 ***
 
diff --git a/doc/quickjs-emscripten-core/interfaces/ModuleEvalOptions.md b/doc/quickjs-emscripten-core/interfaces/ModuleEvalOptions.md
index 4007ac79b..1804e4f68 100644
--- a/doc/quickjs-emscripten-core/interfaces/ModuleEvalOptions.md
+++ b/doc/quickjs-emscripten-core/interfaces/ModuleEvalOptions.md
@@ -27,7 +27,7 @@ To remove the limit, set to `0`.
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/module.ts:82](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/module.ts#L82)
+[packages/quickjs-emscripten-core/src/module.ts:85](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/module.ts#L85)
 
 ***
 
@@ -39,7 +39,7 @@ Memory limit, in bytes, of WebAssembly heap memory used by the QuickJS VM.
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/module.ts:76](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/module.ts#L76)
+[packages/quickjs-emscripten-core/src/module.ts:79](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/module.ts#L79)
 
 ***
 
@@ -51,7 +51,7 @@ Module loader for any `import` statements or expressions.
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/module.ts:87](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/module.ts#L87)
+[packages/quickjs-emscripten-core/src/module.ts:90](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/module.ts#L90)
 
 ***
 
@@ -64,7 +64,7 @@ See [shouldInterruptAfterDeadline](../exports.md#shouldinterruptafterdeadline).
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/module.ts:71](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/module.ts#L71)
+[packages/quickjs-emscripten-core/src/module.ts:74](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/module.ts#L74)
 
 ***
 
diff --git a/doc/quickjs-emscripten-core/interfaces/QuickJSAsyncEmscriptenModule.md b/doc/quickjs-emscripten-core/interfaces/QuickJSAsyncEmscriptenModule.md
index 5d3924f3c..41a1d7c80 100644
--- a/doc/quickjs-emscripten-core/interfaces/QuickJSAsyncEmscriptenModule.md
+++ b/doc/quickjs-emscripten-core/interfaces/QuickJSAsyncEmscriptenModule.md
@@ -55,7 +55,7 @@ QuickJS.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:168](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L168)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:169](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L169)
 
 ***
 
@@ -69,7 +69,7 @@ QuickJS.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:158](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L158)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:159](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L159)
 
 ***
 
@@ -83,7 +83,7 @@ QuickJS.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:159](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L159)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:160](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L160)
 
 ***
 
@@ -97,7 +97,7 @@ QuickJS.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:157](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L157)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:158](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L158)
 
 ***
 
@@ -111,7 +111,7 @@ QuickJS.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:163](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L163)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:164](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L164)
 
 ***
 
@@ -125,7 +125,7 @@ QuickJS.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:164](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L164)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:165](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L165)
 
 ***
 
@@ -139,7 +139,7 @@ QuickJS.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:161](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L161)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:162](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L162)
 
 ***
 
@@ -153,7 +153,7 @@ QuickJS.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:162](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L162)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:163](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L163)
 
 ***
 
@@ -167,7 +167,7 @@ QuickJS.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:160](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L160)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:161](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L161)
 
 ***
 
@@ -181,7 +181,7 @@ QuickJS.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:167](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L167)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:168](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L168)
 
 ***
 
@@ -195,7 +195,7 @@ QuickJS.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:166](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L166)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:167](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L167)
 
 ***
 
@@ -205,7 +205,7 @@ QuickJS.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:243](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L243)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:250](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L250)
 
 ***
 
@@ -219,7 +219,7 @@ Implement this field
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:242](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L242)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:249](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L249)
 
 ***
 
@@ -235,7 +235,7 @@ Compile this to WebAssembly.Module
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:104](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L104)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:105](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L105)
 
 ***
 
@@ -251,7 +251,7 @@ If provided, use this WebAssembly.Memory instead of an automatically created one
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:107](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L107)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:108](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L108)
 
 ## Methods
 
@@ -278,7 +278,7 @@ https://emscripten.org/docs/api_reference/preamble.js.html#UTF8ToString
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:144](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L144)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:145](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L145)
 
 ***
 
@@ -300,7 +300,7 @@ https://emscripten.org/docs/api_reference/preamble.js.html#UTF8ToString
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:148](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L148)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:149](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L149)
 
 ***
 
@@ -322,7 +322,7 @@ https://emscripten.org/docs/api_reference/preamble.js.html#UTF8ToString
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:147](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L147)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:148](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L148)
 
 ***
 
@@ -359,7 +359,7 @@ https://emscripten.org/docs/api_reference/preamble.js.html#UTF8ToString
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:149](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L149)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:150](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L150)
 
 ***
 
@@ -385,7 +385,7 @@ Create an instance of the WASM module, call onSuccess(instance), then return ins
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:110](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L110)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:111](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L111)
 
 ***
 
@@ -407,7 +407,7 @@ Create an instance of the WASM module, call onSuccess(instance), then return ins
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:145](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L145)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:146](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L146)
 
 ***
 
@@ -451,7 +451,7 @@ Often `''` (empty string)
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:97](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L97)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:98](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L98)
 
 ***
 
@@ -475,7 +475,7 @@ Called by emscripten as dependencies blocking initialization are added or fulfil
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:116](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L116)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:117](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L117)
 
 ***
 
@@ -504,7 +504,7 @@ https://emscripten.org/docs/api_reference/preamble.js.html#stringToUTF8
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:139](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L139)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:140](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L140)
 
 ***
 
diff --git a/doc/quickjs-emscripten-core/interfaces/QuickJSAsyncFFI.md b/doc/quickjs-emscripten-core/interfaces/QuickJSAsyncFFI.md
index cbcad7484..a52ba33d2 100644
--- a/doc/quickjs-emscripten-core/interfaces/QuickJSAsyncFFI.md
+++ b/doc/quickjs-emscripten-core/interfaces/QuickJSAsyncFFI.md
@@ -41,6 +41,7 @@ library.
   - [QTS\_GetFalse](QuickJSAsyncFFI.md#qts-getfalse)
   - [QTS\_GetFloat64](QuickJSAsyncFFI.md#qts-getfloat64)
   - [QTS\_GetGlobalObject](QuickJSAsyncFFI.md#qts-getglobalobject)
+  - [QTS\_GetHostRefId](QuickJSAsyncFFI.md#qts-gethostrefid)
   - [QTS\_GetLength](QuickJSAsyncFFI.md#qts-getlength)
   - [QTS\_GetModuleNamespace](QuickJSAsyncFFI.md#qts-getmodulenamespace)
   - [QTS\_GetNull](QuickJSAsyncFFI.md#qts-getnull)
@@ -64,6 +65,7 @@ library.
   - [QTS\_NewError](QuickJSAsyncFFI.md#qts-newerror)
   - [QTS\_NewFloat64](QuickJSAsyncFFI.md#qts-newfloat64)
   - [QTS\_NewFunction](QuickJSAsyncFFI.md#qts-newfunction)
+  - [QTS\_NewHostRef](QuickJSAsyncFFI.md#qts-newhostref)
   - [QTS\_NewObject](QuickJSAsyncFFI.md#qts-newobject)
   - [QTS\_NewObjectProto](QuickJSAsyncFFI.md#qts-newobjectproto)
   - [QTS\_NewPromiseCapability](QuickJSAsyncFFI.md#qts-newpromisecapability)
@@ -105,7 +107,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:39](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L39)
+[packages/quickjs-ffi-types/src/ffi-async.ts:40](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L40)
 
 ***
 
@@ -125,7 +127,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:250](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L250)
+[packages/quickjs-ffi-types/src/ffi-async.ts:259](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L259)
 
 ***
 
@@ -139,7 +141,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:248](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L248)
+[packages/quickjs-ffi-types/src/ffi-async.ts:251](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L251)
 
 ***
 
@@ -153,7 +155,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:247](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L247)
+[packages/quickjs-ffi-types/src/ffi-async.ts:250](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L250)
 
 ***
 
@@ -167,7 +169,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:47](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L47)
+[packages/quickjs-ffi-types/src/ffi-async.ts:48](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L48)
 
 ***
 
@@ -193,7 +195,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:173](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L173)
+[packages/quickjs-ffi-types/src/ffi-async.ts:176](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L176)
 
 ***
 
@@ -219,7 +221,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:180](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L180)
+[packages/quickjs-ffi-types/src/ffi-async.ts:183](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L183)
 
 ***
 
@@ -253,7 +255,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:148](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L148)
+[packages/quickjs-ffi-types/src/ffi-async.ts:151](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L151)
 
 ***
 
@@ -273,7 +275,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:188](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L188)
+[packages/quickjs-ffi-types/src/ffi-async.ts:191](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L191)
 
 ***
 
@@ -293,7 +295,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:192](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L192)
+[packages/quickjs-ffi-types/src/ffi-async.ts:195](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L195)
 
 ***
 
@@ -313,7 +315,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:61](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L61)
+[packages/quickjs-ffi-types/src/ffi-async.ts:64](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L64)
 
 ***
 
@@ -341,7 +343,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:196](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L196)
+[packages/quickjs-ffi-types/src/ffi-async.ts:199](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L199)
 
 ***
 
@@ -369,7 +371,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:204](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L204)
+[packages/quickjs-ffi-types/src/ffi-async.ts:207](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L207)
 
 ***
 
@@ -391,7 +393,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:106](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L106)
+[packages/quickjs-ffi-types/src/ffi-async.ts:109](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L109)
 
 ***
 
@@ -413,7 +415,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:111](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L111)
+[packages/quickjs-ffi-types/src/ffi-async.ts:114](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L114)
 
 ***
 
@@ -433,7 +435,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:60](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L60)
+[packages/quickjs-ffi-types/src/ffi-async.ts:63](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L63)
 
 ***
 
@@ -451,7 +453,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:56](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L56)
+[packages/quickjs-ffi-types/src/ffi-async.ts:59](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L59)
 
 ***
 
@@ -469,7 +471,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:54](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L54)
+[packages/quickjs-ffi-types/src/ffi-async.ts:57](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L57)
 
 ***
 
@@ -489,7 +491,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:57](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L57)
+[packages/quickjs-ffi-types/src/ffi-async.ts:60](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L60)
 
 ***
 
@@ -509,7 +511,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:58](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L58)
+[packages/quickjs-ffi-types/src/ffi-async.ts:61](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L61)
 
 ***
 
@@ -529,7 +531,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:59](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L59)
+[packages/quickjs-ffi-types/src/ffi-async.ts:62](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L62)
 
 ***
 
@@ -549,7 +551,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:83](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L83)
+[packages/quickjs-ffi-types/src/ffi-async.ts:86](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L86)
 
 ***
 
@@ -569,7 +571,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:87](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L87)
+[packages/quickjs-ffi-types/src/ffi-async.ts:90](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L90)
 
 ***
 
@@ -587,7 +589,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:245](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L245)
+[packages/quickjs-ffi-types/src/ffi-async.ts:248](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L248)
 
 ***
 
@@ -601,7 +603,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:51](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L51)
+[packages/quickjs-ffi-types/src/ffi-async.ts:52](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L52)
 
 ***
 
@@ -621,7 +623,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:77](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L77)
+[packages/quickjs-ffi-types/src/ffi-async.ts:80](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L80)
 
 ***
 
@@ -639,7 +641,25 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:231](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L231)
+[packages/quickjs-ffi-types/src/ffi-async.ts:234](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L234)
+
+***
+
+### QTS\_GetHostRefId
+
+> **QTS\_GetHostRefId**: (`value`) => `HostRefId`
+
+#### Parameters
+
+• **value**: [`JSValuePointer`](../exports.md#jsvaluepointer) \| [`JSValueConstPointer`](../exports.md#jsvalueconstpointer)
+
+#### Returns
+
+`HostRefId`
+
+#### Source
+
+[packages/quickjs-ffi-types/src/ffi-async.ts:55](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L55)
 
 ***
 
@@ -661,7 +681,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:220](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L220)
+[packages/quickjs-ffi-types/src/ffi-async.ts:223](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L223)
 
 ***
 
@@ -681,7 +701,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:212](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L212)
+[packages/quickjs-ffi-types/src/ffi-async.ts:215](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L215)
 
 ***
 
@@ -695,7 +715,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:50](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L50)
+[packages/quickjs-ffi-types/src/ffi-async.ts:51](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L51)
 
 ***
 
@@ -721,7 +741,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:159](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L159)
+[packages/quickjs-ffi-types/src/ffi-async.ts:162](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L162)
 
 ***
 
@@ -747,7 +767,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:166](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L166)
+[packages/quickjs-ffi-types/src/ffi-async.ts:169](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L169)
 
 ***
 
@@ -769,7 +789,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:116](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L116)
+[packages/quickjs-ffi-types/src/ffi-async.ts:119](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L119)
 
 ***
 
@@ -791,7 +811,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:126](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L126)
+[packages/quickjs-ffi-types/src/ffi-async.ts:129](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L129)
 
 ***
 
@@ -813,7 +833,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:131](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L131)
+[packages/quickjs-ffi-types/src/ffi-async.ts:134](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L134)
 
 ***
 
@@ -835,7 +855,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:121](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L121)
+[packages/quickjs-ffi-types/src/ffi-async.ts:124](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L124)
 
 ***
 
@@ -855,7 +875,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:79](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L79)
+[packages/quickjs-ffi-types/src/ffi-async.ts:82](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L82)
 
 ***
 
@@ -875,7 +895,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:96](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L96)
+[packages/quickjs-ffi-types/src/ffi-async.ts:99](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L99)
 
 ***
 
@@ -895,7 +915,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:100](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L100)
+[packages/quickjs-ffi-types/src/ffi-async.ts:103](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L103)
 
 ***
 
@@ -909,7 +929,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:52](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L52)
+[packages/quickjs-ffi-types/src/ffi-async.ts:53](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L53)
 
 ***
 
@@ -923,7 +943,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:49](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L49)
+[packages/quickjs-ffi-types/src/ffi-async.ts:50](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L50)
 
 ***
 
@@ -947,7 +967,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:225](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L225)
+[packages/quickjs-ffi-types/src/ffi-async.ts:228](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L228)
 
 ***
 
@@ -967,7 +987,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:104](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L104)
+[packages/quickjs-ffi-types/src/ffi-async.ts:107](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L107)
 
 ***
 
@@ -985,7 +1005,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:105](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L105)
+[packages/quickjs-ffi-types/src/ffi-async.ts:108](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L108)
 
 ***
 
@@ -1003,7 +1023,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:70](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L70)
+[packages/quickjs-ffi-types/src/ffi-async.ts:73](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L73)
 
 ***
 
@@ -1025,7 +1045,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:71](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L71)
+[packages/quickjs-ffi-types/src/ffi-async.ts:74](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L74)
 
 ***
 
@@ -1045,7 +1065,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:55](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L55)
+[packages/quickjs-ffi-types/src/ffi-async.ts:58](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L58)
 
 ***
 
@@ -1063,7 +1083,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:42](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L42)
+[packages/quickjs-ffi-types/src/ffi-async.ts:43](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L43)
 
 ***
 
@@ -1083,29 +1103,53 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:76](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L76)
+[packages/quickjs-ffi-types/src/ffi-async.ts:79](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L79)
 
 ***
 
 ### QTS\_NewFunction
 
-> **QTS\_NewFunction**: (`ctx`, `func_id`, `name`) => [`JSValuePointer`](../exports.md#jsvaluepointer)
+> **QTS\_NewFunction**: (`ctx`, `name`, `arg_length`, `is_constructor`, `host_ref_id`) => [`JSValuePointer`](../exports.md#jsvaluepointer)
 
 #### Parameters
 
 • **ctx**: [`JSContextPointer`](../exports.md#jscontextpointer)
 
-• **func\_id**: `number`
-
 • **name**: `string`
 
+• **arg\_length**: `number`
+
+• **is\_constructor**: `boolean`
+
+• **host\_ref\_id**: `HostRefId`
+
 #### Returns
 
 [`JSValuePointer`](../exports.md#jsvaluepointer)
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:249](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L249)
+[packages/quickjs-ffi-types/src/ffi-async.ts:252](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L252)
+
+***
+
+### QTS\_NewHostRef
+
+> **QTS\_NewHostRef**: (`ctx`, `id`) => [`JSValuePointer`](../exports.md#jsvaluepointer)
+
+#### Parameters
+
+• **ctx**: [`JSContextPointer`](../exports.md#jscontextpointer)
+
+• **id**: `HostRefId`
+
+#### Returns
+
+[`JSValuePointer`](../exports.md#jsvaluepointer)
+
+#### Source
+
+[packages/quickjs-ffi-types/src/ffi-async.ts:54](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L54)
 
 ***
 
@@ -1123,7 +1167,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:65](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L65)
+[packages/quickjs-ffi-types/src/ffi-async.ts:68](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L68)
 
 ***
 
@@ -1143,7 +1187,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:66](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L66)
+[packages/quickjs-ffi-types/src/ffi-async.ts:69](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L69)
 
 ***
 
@@ -1163,7 +1207,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:232](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L232)
+[packages/quickjs-ffi-types/src/ffi-async.ts:235](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L235)
 
 ***
 
@@ -1177,7 +1221,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:53](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L53)
+[packages/quickjs-ffi-types/src/ffi-async.ts:56](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L56)
 
 ***
 
@@ -1197,7 +1241,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:78](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L78)
+[packages/quickjs-ffi-types/src/ffi-async.ts:81](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L81)
 
 ***
 
@@ -1219,7 +1263,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:91](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L91)
+[packages/quickjs-ffi-types/src/ffi-async.ts:94](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L94)
 
 ***
 
@@ -1239,7 +1283,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:240](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L240)
+[packages/quickjs-ffi-types/src/ffi-async.ts:243](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L243)
 
 ***
 
@@ -1259,7 +1303,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:236](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L236)
+[packages/quickjs-ffi-types/src/ffi-async.ts:239](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L239)
 
 ***
 
@@ -1273,7 +1317,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:46](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L46)
+[packages/quickjs-ffi-types/src/ffi-async.ts:47](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L47)
 
 ***
 
@@ -1293,7 +1337,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:187](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L187)
+[packages/quickjs-ffi-types/src/ffi-async.ts:190](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L190)
 
 ***
 
@@ -1313,7 +1357,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:44](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L44)
+[packages/quickjs-ffi-types/src/ffi-async.ts:45](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L45)
 
 ***
 
@@ -1331,7 +1375,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:255](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L255)
+[packages/quickjs-ffi-types/src/ffi-async.ts:264](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L264)
 
 ***
 
@@ -1349,7 +1393,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:257](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L257)
+[packages/quickjs-ffi-types/src/ffi-async.ts:266](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L266)
 
 ***
 
@@ -1367,7 +1411,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:45](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L45)
+[packages/quickjs-ffi-types/src/ffi-async.ts:46](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L46)
 
 ***
 
@@ -1385,7 +1429,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:254](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L254)
+[packages/quickjs-ffi-types/src/ffi-async.ts:263](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L263)
 
 ***
 
@@ -1405,7 +1449,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:256](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L256)
+[packages/quickjs-ffi-types/src/ffi-async.ts:265](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L265)
 
 ***
 
@@ -1425,7 +1469,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:48](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L48)
+[packages/quickjs-ffi-types/src/ffi-async.ts:49](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L49)
 
 ***
 
@@ -1445,7 +1489,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:43](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L43)
+[packages/quickjs-ffi-types/src/ffi-async.ts:44](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L44)
 
 ***
 
@@ -1465,7 +1509,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:246](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L246)
+[packages/quickjs-ffi-types/src/ffi-async.ts:249](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L249)
 
 ***
 
@@ -1489,7 +1533,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:136](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L136)
+[packages/quickjs-ffi-types/src/ffi-async.ts:139](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L139)
 
 ***
 
@@ -1513,7 +1557,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:142](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L142)
+[packages/quickjs-ffi-types/src/ffi-async.ts:145](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L145)
 
 ***
 
@@ -1531,7 +1575,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:244](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L244)
+[packages/quickjs-ffi-types/src/ffi-async.ts:247](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L247)
 
 ***
 
@@ -1551,7 +1595,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:41](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L41)
+[packages/quickjs-ffi-types/src/ffi-async.ts:42](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L42)
 
 ***
 
@@ -1571,7 +1615,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:216](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L216)
+[packages/quickjs-ffi-types/src/ffi-async.ts:219](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L219)
 
 ***
 
@@ -1591,7 +1635,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:262](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L262)
+[packages/quickjs-ffi-types/src/ffi-async.ts:271](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L271)
 
 ***
 
@@ -1611,7 +1655,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi-async.ts:258](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L258)
+[packages/quickjs-ffi-types/src/ffi-async.ts:267](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi-async.ts#L267)
 
 ***
 
diff --git a/doc/quickjs-emscripten-core/interfaces/QuickJSEmscriptenModule.md b/doc/quickjs-emscripten-core/interfaces/QuickJSEmscriptenModule.md
index f3621bfea..a598870cd 100644
--- a/doc/quickjs-emscripten-core/interfaces/QuickJSEmscriptenModule.md
+++ b/doc/quickjs-emscripten-core/interfaces/QuickJSEmscriptenModule.md
@@ -55,7 +55,7 @@ QuickJS.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:168](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L168)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:169](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L169)
 
 ***
 
@@ -69,7 +69,7 @@ QuickJS.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:158](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L158)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:159](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L159)
 
 ***
 
@@ -83,7 +83,7 @@ QuickJS.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:159](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L159)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:160](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L160)
 
 ***
 
@@ -97,7 +97,7 @@ QuickJS.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:157](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L157)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:158](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L158)
 
 ***
 
@@ -111,7 +111,7 @@ QuickJS.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:163](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L163)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:164](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L164)
 
 ***
 
@@ -125,7 +125,7 @@ QuickJS.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:164](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L164)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:165](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L165)
 
 ***
 
@@ -139,7 +139,7 @@ QuickJS.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:161](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L161)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:162](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L162)
 
 ***
 
@@ -153,7 +153,7 @@ QuickJS.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:162](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L162)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:163](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L163)
 
 ***
 
@@ -167,7 +167,7 @@ QuickJS.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:160](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L160)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:161](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L161)
 
 ***
 
@@ -181,7 +181,7 @@ QuickJS.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:167](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L167)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:168](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L168)
 
 ***
 
@@ -195,7 +195,7 @@ QuickJS.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:166](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L166)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:167](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L167)
 
 ***
 
@@ -205,7 +205,7 @@ QuickJS.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:237](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L237)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:244](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L244)
 
 ***
 
@@ -215,7 +215,7 @@ QuickJS.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:236](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L236)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:243](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L243)
 
 ***
 
@@ -231,7 +231,7 @@ Compile this to WebAssembly.Module
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:104](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L104)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:105](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L105)
 
 ***
 
@@ -247,7 +247,7 @@ If provided, use this WebAssembly.Memory instead of an automatically created one
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:107](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L107)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:108](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L108)
 
 ## Methods
 
@@ -274,7 +274,7 @@ https://emscripten.org/docs/api_reference/preamble.js.html#UTF8ToString
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:144](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L144)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:145](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L145)
 
 ***
 
@@ -296,7 +296,7 @@ https://emscripten.org/docs/api_reference/preamble.js.html#UTF8ToString
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:148](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L148)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:149](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L149)
 
 ***
 
@@ -318,7 +318,7 @@ https://emscripten.org/docs/api_reference/preamble.js.html#UTF8ToString
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:147](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L147)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:148](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L148)
 
 ***
 
@@ -355,7 +355,7 @@ https://emscripten.org/docs/api_reference/preamble.js.html#UTF8ToString
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:149](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L149)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:150](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L150)
 
 ***
 
@@ -381,7 +381,7 @@ Create an instance of the WASM module, call onSuccess(instance), then return ins
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:110](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L110)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:111](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L111)
 
 ***
 
@@ -403,7 +403,7 @@ Create an instance of the WASM module, call onSuccess(instance), then return ins
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:145](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L145)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:146](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L146)
 
 ***
 
@@ -447,7 +447,7 @@ Often `''` (empty string)
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:97](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L97)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:98](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L98)
 
 ***
 
@@ -471,7 +471,7 @@ Called by emscripten as dependencies blocking initialization are added or fulfil
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:116](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L116)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:117](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L117)
 
 ***
 
@@ -500,7 +500,7 @@ https://emscripten.org/docs/api_reference/preamble.js.html#stringToUTF8
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:139](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L139)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:140](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L140)
 
 ***
 
diff --git a/doc/quickjs-emscripten-core/interfaces/QuickJSFFI.md b/doc/quickjs-emscripten-core/interfaces/QuickJSFFI.md
index 4251716a5..638a9afc4 100644
--- a/doc/quickjs-emscripten-core/interfaces/QuickJSFFI.md
+++ b/doc/quickjs-emscripten-core/interfaces/QuickJSFFI.md
@@ -37,6 +37,7 @@ library.
   - [QTS\_GetFalse](QuickJSFFI.md#qts-getfalse)
   - [QTS\_GetFloat64](QuickJSFFI.md#qts-getfloat64)
   - [QTS\_GetGlobalObject](QuickJSFFI.md#qts-getglobalobject)
+  - [QTS\_GetHostRefId](QuickJSFFI.md#qts-gethostrefid)
   - [QTS\_GetLength](QuickJSFFI.md#qts-getlength)
   - [QTS\_GetModuleNamespace](QuickJSFFI.md#qts-getmodulenamespace)
   - [QTS\_GetNull](QuickJSFFI.md#qts-getnull)
@@ -56,6 +57,7 @@ library.
   - [QTS\_NewError](QuickJSFFI.md#qts-newerror)
   - [QTS\_NewFloat64](QuickJSFFI.md#qts-newfloat64)
   - [QTS\_NewFunction](QuickJSFFI.md#qts-newfunction)
+  - [QTS\_NewHostRef](QuickJSFFI.md#qts-newhostref)
   - [QTS\_NewObject](QuickJSFFI.md#qts-newobject)
   - [QTS\_NewObjectProto](QuickJSFFI.md#qts-newobjectproto)
   - [QTS\_NewPromiseCapability](QuickJSFFI.md#qts-newpromisecapability)
@@ -96,7 +98,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi.ts:38](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L38)
+[packages/quickjs-ffi-types/src/ffi.ts:39](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L39)
 
 ***
 
@@ -116,7 +118,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi.ts:198](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L198)
+[packages/quickjs-ffi-types/src/ffi.ts:207](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L207)
 
 ***
 
@@ -130,7 +132,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi.ts:196](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L196)
+[packages/quickjs-ffi-types/src/ffi.ts:199](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L199)
 
 ***
 
@@ -144,7 +146,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi.ts:195](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L195)
+[packages/quickjs-ffi-types/src/ffi.ts:198](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L198)
 
 ***
 
@@ -158,7 +160,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi.ts:46](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L46)
+[packages/quickjs-ffi-types/src/ffi.ts:47](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L47)
 
 ***
 
@@ -184,7 +186,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi.ts:140](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L140)
+[packages/quickjs-ffi-types/src/ffi.ts:143](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L143)
 
 ***
 
@@ -218,7 +220,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi.ts:122](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L122)
+[packages/quickjs-ffi-types/src/ffi.ts:125](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L125)
 
 ***
 
@@ -238,7 +240,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi.ts:148](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L148)
+[packages/quickjs-ffi-types/src/ffi.ts:151](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L151)
 
 ***
 
@@ -258,7 +260,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi.ts:60](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L60)
+[packages/quickjs-ffi-types/src/ffi.ts:63](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L63)
 
 ***
 
@@ -286,7 +288,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi.ts:152](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L152)
+[packages/quickjs-ffi-types/src/ffi.ts:155](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L155)
 
 ***
 
@@ -308,7 +310,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi.ts:101](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L101)
+[packages/quickjs-ffi-types/src/ffi.ts:104](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L104)
 
 ***
 
@@ -328,7 +330,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi.ts:59](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L59)
+[packages/quickjs-ffi-types/src/ffi.ts:62](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L62)
 
 ***
 
@@ -346,7 +348,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi.ts:55](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L55)
+[packages/quickjs-ffi-types/src/ffi.ts:58](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L58)
 
 ***
 
@@ -364,7 +366,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi.ts:53](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L53)
+[packages/quickjs-ffi-types/src/ffi.ts:56](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L56)
 
 ***
 
@@ -384,7 +386,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi.ts:56](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L56)
+[packages/quickjs-ffi-types/src/ffi.ts:59](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L59)
 
 ***
 
@@ -404,7 +406,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi.ts:57](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L57)
+[packages/quickjs-ffi-types/src/ffi.ts:60](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L60)
 
 ***
 
@@ -424,7 +426,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi.ts:58](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L58)
+[packages/quickjs-ffi-types/src/ffi.ts:61](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L61)
 
 ***
 
@@ -444,7 +446,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi.ts:82](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L82)
+[packages/quickjs-ffi-types/src/ffi.ts:85](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L85)
 
 ***
 
@@ -464,7 +466,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi.ts:86](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L86)
+[packages/quickjs-ffi-types/src/ffi.ts:89](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L89)
 
 ***
 
@@ -482,7 +484,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi.ts:193](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L193)
+[packages/quickjs-ffi-types/src/ffi.ts:196](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L196)
 
 ***
 
@@ -496,7 +498,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi.ts:50](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L50)
+[packages/quickjs-ffi-types/src/ffi.ts:51](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L51)
 
 ***
 
@@ -516,7 +518,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi.ts:76](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L76)
+[packages/quickjs-ffi-types/src/ffi.ts:79](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L79)
 
 ***
 
@@ -534,7 +536,25 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi.ts:179](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L179)
+[packages/quickjs-ffi-types/src/ffi.ts:182](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L182)
+
+***
+
+### QTS\_GetHostRefId
+
+> **QTS\_GetHostRefId**: (`value`) => `HostRefId`
+
+#### Parameters
+
+• **value**: [`JSValuePointer`](../exports.md#jsvaluepointer) \| [`JSValueConstPointer`](../exports.md#jsvalueconstpointer)
+
+#### Returns
+
+`HostRefId`
+
+#### Source
+
+[packages/quickjs-ffi-types/src/ffi.ts:54](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L54)
 
 ***
 
@@ -556,7 +576,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi.ts:168](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L168)
+[packages/quickjs-ffi-types/src/ffi.ts:171](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L171)
 
 ***
 
@@ -576,7 +596,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi.ts:160](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L160)
+[packages/quickjs-ffi-types/src/ffi.ts:163](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L163)
 
 ***
 
@@ -590,7 +610,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi.ts:49](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L49)
+[packages/quickjs-ffi-types/src/ffi.ts:50](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L50)
 
 ***
 
@@ -616,7 +636,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi.ts:133](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L133)
+[packages/quickjs-ffi-types/src/ffi.ts:136](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L136)
 
 ***
 
@@ -638,7 +658,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi.ts:106](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L106)
+[packages/quickjs-ffi-types/src/ffi.ts:109](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L109)
 
 ***
 
@@ -660,7 +680,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi.ts:111](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L111)
+[packages/quickjs-ffi-types/src/ffi.ts:114](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L114)
 
 ***
 
@@ -680,7 +700,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi.ts:78](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L78)
+[packages/quickjs-ffi-types/src/ffi.ts:81](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L81)
 
 ***
 
@@ -700,7 +720,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi.ts:95](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L95)
+[packages/quickjs-ffi-types/src/ffi.ts:98](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L98)
 
 ***
 
@@ -714,7 +734,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi.ts:51](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L51)
+[packages/quickjs-ffi-types/src/ffi.ts:52](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L52)
 
 ***
 
@@ -728,7 +748,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi.ts:48](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L48)
+[packages/quickjs-ffi-types/src/ffi.ts:49](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L49)
 
 ***
 
@@ -752,7 +772,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi.ts:173](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L173)
+[packages/quickjs-ffi-types/src/ffi.ts:176](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L176)
 
 ***
 
@@ -772,7 +792,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi.ts:99](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L99)
+[packages/quickjs-ffi-types/src/ffi.ts:102](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L102)
 
 ***
 
@@ -790,7 +810,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi.ts:100](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L100)
+[packages/quickjs-ffi-types/src/ffi.ts:103](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L103)
 
 ***
 
@@ -808,7 +828,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi.ts:69](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L69)
+[packages/quickjs-ffi-types/src/ffi.ts:72](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L72)
 
 ***
 
@@ -830,7 +850,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi.ts:70](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L70)
+[packages/quickjs-ffi-types/src/ffi.ts:73](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L73)
 
 ***
 
@@ -850,7 +870,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi.ts:54](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L54)
+[packages/quickjs-ffi-types/src/ffi.ts:57](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L57)
 
 ***
 
@@ -868,7 +888,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi.ts:41](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L41)
+[packages/quickjs-ffi-types/src/ffi.ts:42](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L42)
 
 ***
 
@@ -888,29 +908,53 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi.ts:75](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L75)
+[packages/quickjs-ffi-types/src/ffi.ts:78](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L78)
 
 ***
 
 ### QTS\_NewFunction
 
-> **QTS\_NewFunction**: (`ctx`, `func_id`, `name`) => [`JSValuePointer`](../exports.md#jsvaluepointer)
+> **QTS\_NewFunction**: (`ctx`, `name`, `arg_length`, `is_constructor`, `host_ref_id`) => [`JSValuePointer`](../exports.md#jsvaluepointer)
 
 #### Parameters
 
 • **ctx**: [`JSContextPointer`](../exports.md#jscontextpointer)
 
-• **func\_id**: `number`
-
 • **name**: `string`
 
+• **arg\_length**: `number`
+
+• **is\_constructor**: `boolean`
+
+• **host\_ref\_id**: `HostRefId`
+
 #### Returns
 
 [`JSValuePointer`](../exports.md#jsvaluepointer)
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi.ts:197](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L197)
+[packages/quickjs-ffi-types/src/ffi.ts:200](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L200)
+
+***
+
+### QTS\_NewHostRef
+
+> **QTS\_NewHostRef**: (`ctx`, `id`) => [`JSValuePointer`](../exports.md#jsvaluepointer)
+
+#### Parameters
+
+• **ctx**: [`JSContextPointer`](../exports.md#jscontextpointer)
+
+• **id**: `HostRefId`
+
+#### Returns
+
+[`JSValuePointer`](../exports.md#jsvaluepointer)
+
+#### Source
+
+[packages/quickjs-ffi-types/src/ffi.ts:53](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L53)
 
 ***
 
@@ -928,7 +972,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi.ts:64](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L64)
+[packages/quickjs-ffi-types/src/ffi.ts:67](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L67)
 
 ***
 
@@ -948,7 +992,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi.ts:65](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L65)
+[packages/quickjs-ffi-types/src/ffi.ts:68](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L68)
 
 ***
 
@@ -968,7 +1012,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi.ts:180](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L180)
+[packages/quickjs-ffi-types/src/ffi.ts:183](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L183)
 
 ***
 
@@ -982,7 +1026,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi.ts:52](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L52)
+[packages/quickjs-ffi-types/src/ffi.ts:55](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L55)
 
 ***
 
@@ -1002,7 +1046,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi.ts:77](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L77)
+[packages/quickjs-ffi-types/src/ffi.ts:80](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L80)
 
 ***
 
@@ -1024,7 +1068,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi.ts:90](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L90)
+[packages/quickjs-ffi-types/src/ffi.ts:93](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L93)
 
 ***
 
@@ -1044,7 +1088,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi.ts:188](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L188)
+[packages/quickjs-ffi-types/src/ffi.ts:191](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L191)
 
 ***
 
@@ -1064,7 +1108,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi.ts:184](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L184)
+[packages/quickjs-ffi-types/src/ffi.ts:187](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L187)
 
 ***
 
@@ -1078,7 +1122,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi.ts:45](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L45)
+[packages/quickjs-ffi-types/src/ffi.ts:46](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L46)
 
 ***
 
@@ -1098,7 +1142,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi.ts:147](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L147)
+[packages/quickjs-ffi-types/src/ffi.ts:150](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L150)
 
 ***
 
@@ -1118,7 +1162,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi.ts:43](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L43)
+[packages/quickjs-ffi-types/src/ffi.ts:44](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L44)
 
 ***
 
@@ -1136,7 +1180,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi.ts:203](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L203)
+[packages/quickjs-ffi-types/src/ffi.ts:212](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L212)
 
 ***
 
@@ -1154,7 +1198,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi.ts:205](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L205)
+[packages/quickjs-ffi-types/src/ffi.ts:214](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L214)
 
 ***
 
@@ -1172,7 +1216,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi.ts:44](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L44)
+[packages/quickjs-ffi-types/src/ffi.ts:45](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L45)
 
 ***
 
@@ -1190,7 +1234,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi.ts:202](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L202)
+[packages/quickjs-ffi-types/src/ffi.ts:211](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L211)
 
 ***
 
@@ -1210,7 +1254,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi.ts:204](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L204)
+[packages/quickjs-ffi-types/src/ffi.ts:213](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L213)
 
 ***
 
@@ -1230,7 +1274,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi.ts:47](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L47)
+[packages/quickjs-ffi-types/src/ffi.ts:48](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L48)
 
 ***
 
@@ -1250,7 +1294,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi.ts:42](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L42)
+[packages/quickjs-ffi-types/src/ffi.ts:43](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L43)
 
 ***
 
@@ -1270,7 +1314,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi.ts:194](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L194)
+[packages/quickjs-ffi-types/src/ffi.ts:197](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L197)
 
 ***
 
@@ -1294,7 +1338,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi.ts:116](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L116)
+[packages/quickjs-ffi-types/src/ffi.ts:119](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L119)
 
 ***
 
@@ -1312,7 +1356,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi.ts:192](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L192)
+[packages/quickjs-ffi-types/src/ffi.ts:195](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L195)
 
 ***
 
@@ -1332,7 +1376,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi.ts:40](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L40)
+[packages/quickjs-ffi-types/src/ffi.ts:41](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L41)
 
 ***
 
@@ -1352,7 +1396,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi.ts:164](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L164)
+[packages/quickjs-ffi-types/src/ffi.ts:167](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L167)
 
 ***
 
@@ -1372,7 +1416,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi.ts:210](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L210)
+[packages/quickjs-ffi-types/src/ffi.ts:219](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L219)
 
 ***
 
@@ -1392,7 +1436,7 @@ Set at compile time.
 
 #### Source
 
-[packages/quickjs-ffi-types/src/ffi.ts:206](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L206)
+[packages/quickjs-ffi-types/src/ffi.ts:215](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/ffi.ts#L215)
 
 ***
 
diff --git a/doc/quickjs-emscripten-core/interfaces/SourceMapData.md b/doc/quickjs-emscripten-core/interfaces/SourceMapData.md
index 31350f94f..2369ac1e8 100644
--- a/doc/quickjs-emscripten-core/interfaces/SourceMapData.md
+++ b/doc/quickjs-emscripten-core/interfaces/SourceMapData.md
@@ -22,7 +22,7 @@
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:58](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L58)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:59](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L59)
 
 ***
 
@@ -32,7 +32,7 @@
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:57](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L57)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:58](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L58)
 
 ***
 
@@ -42,7 +42,7 @@
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:56](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L56)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:57](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L57)
 
 ***
 
@@ -52,7 +52,7 @@
 
 #### Source
 
-[packages/quickjs-ffi-types/src/emscripten-types.ts:55](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L55)
+[packages/quickjs-ffi-types/src/emscripten-types.ts:56](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-ffi-types/src/emscripten-types.ts#L56)
 
 ***
 
diff --git a/doc/quickjs-emscripten-core/namespaces/errors/README.md b/doc/quickjs-emscripten-core/namespaces/errors/README.md
index 46c855dd5..beed0e962 100644
--- a/doc/quickjs-emscripten-core/namespaces/errors/README.md
+++ b/doc/quickjs-emscripten-core/namespaces/errors/README.md
@@ -16,6 +16,8 @@ Collects the informative errors this library may throw.
 - [QuickJSAsyncifySuspended](classes/QuickJSAsyncifySuspended.md)
 - [QuickJSEmptyGetOwnPropertyNames](classes/QuickJSEmptyGetOwnPropertyNames.md)
 - [QuickJSEmscriptenModuleError](classes/QuickJSEmscriptenModuleError.md)
+- [QuickJSHostRefInvalid](classes/QuickJSHostRefInvalid.md)
+- [QuickJSHostRefRangeExceeded](classes/QuickJSHostRefRangeExceeded.md)
 - [QuickJSMemoryLeakDetected](classes/QuickJSMemoryLeakDetected.md)
 - [QuickJSNotImplemented](classes/QuickJSNotImplemented.md)
 - [QuickJSPromisePending](classes/QuickJSPromisePending.md)
diff --git a/doc/quickjs-emscripten-core/namespaces/errors/classes/QuickJSHostRefInvalid.md b/doc/quickjs-emscripten-core/namespaces/errors/classes/QuickJSHostRefInvalid.md
new file mode 100644
index 000000000..42e991919
--- /dev/null
+++ b/doc/quickjs-emscripten-core/namespaces/errors/classes/QuickJSHostRefInvalid.md
@@ -0,0 +1,59 @@
+[quickjs-emscripten](../../../../packages.md) • **quickjs-emscripten-core** • [Readme](../../../README.md) \| [Exports](../../../exports.md)
+
+***
+
+[quickjs-emscripten](../../../../packages.md) / [quickjs-emscripten-core](../../../exports.md) / [errors](../README.md) / QuickJSHostRefInvalid
+
+# Class: QuickJSHostRefInvalid
+
+## Contents
+
+- [Extends](QuickJSHostRefInvalid.md#extends)
+- [Constructors](QuickJSHostRefInvalid.md#constructors)
+  - [new QuickJSHostRefInvalid(message)](QuickJSHostRefInvalid.md#new-quickjshostrefinvalidmessage)
+- [Properties](QuickJSHostRefInvalid.md#properties)
+  - [name](QuickJSHostRefInvalid.md#name)
+
+## Extends
+
+- `Error`
+
+## Constructors
+
+### new QuickJSHostRefInvalid(message)
+
+> **new QuickJSHostRefInvalid**(`message`?): [`QuickJSHostRefInvalid`](QuickJSHostRefInvalid.md)
+
+#### Parameters
+
+• **message?**: `string`
+
+#### Returns
+
+[`QuickJSHostRefInvalid`](QuickJSHostRefInvalid.md)
+
+#### Inherited from
+
+`Error.constructor`
+
+#### Source
+
+node\_modules/typescript/lib/lib.es5.d.ts:1081
+
+## Properties
+
+### name
+
+> **name**: `string` = `"QuickJSHostRefInvalid"`
+
+#### Overrides
+
+`Error.name`
+
+#### Source
+
+[packages/quickjs-emscripten-core/src/errors.ts:65](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/errors.ts#L65)
+
+***
+
+Generated using [typedoc-plugin-markdown](https://www.npmjs.com/package/typedoc-plugin-markdown) and [TypeDoc](https://typedoc.org/)
diff --git a/doc/quickjs-emscripten-core/namespaces/errors/classes/QuickJSHostRefRangeExceeded.md b/doc/quickjs-emscripten-core/namespaces/errors/classes/QuickJSHostRefRangeExceeded.md
new file mode 100644
index 000000000..ca9ae2da5
--- /dev/null
+++ b/doc/quickjs-emscripten-core/namespaces/errors/classes/QuickJSHostRefRangeExceeded.md
@@ -0,0 +1,59 @@
+[quickjs-emscripten](../../../../packages.md) • **quickjs-emscripten-core** • [Readme](../../../README.md) \| [Exports](../../../exports.md)
+
+***
+
+[quickjs-emscripten](../../../../packages.md) / [quickjs-emscripten-core](../../../exports.md) / [errors](../README.md) / QuickJSHostRefRangeExceeded
+
+# Class: QuickJSHostRefRangeExceeded
+
+## Contents
+
+- [Extends](QuickJSHostRefRangeExceeded.md#extends)
+- [Constructors](QuickJSHostRefRangeExceeded.md#constructors)
+  - [new QuickJSHostRefRangeExceeded(message)](QuickJSHostRefRangeExceeded.md#new-quickjshostrefrangeexceededmessage)
+- [Properties](QuickJSHostRefRangeExceeded.md#properties)
+  - [name](QuickJSHostRefRangeExceeded.md#name)
+
+## Extends
+
+- `Error`
+
+## Constructors
+
+### new QuickJSHostRefRangeExceeded(message)
+
+> **new QuickJSHostRefRangeExceeded**(`message`?): [`QuickJSHostRefRangeExceeded`](QuickJSHostRefRangeExceeded.md)
+
+#### Parameters
+
+• **message?**: `string`
+
+#### Returns
+
+[`QuickJSHostRefRangeExceeded`](QuickJSHostRefRangeExceeded.md)
+
+#### Inherited from
+
+`Error.constructor`
+
+#### Source
+
+node\_modules/typescript/lib/lib.es5.d.ts:1081
+
+## Properties
+
+### name
+
+> **name**: `string` = `"QuickJSHostRefRangeExceeded"`
+
+#### Overrides
+
+`Error.name`
+
+#### Source
+
+[packages/quickjs-emscripten-core/src/errors.ts:61](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/errors.ts#L61)
+
+***
+
+Generated using [typedoc-plugin-markdown](https://www.npmjs.com/package/typedoc-plugin-markdown) and [TypeDoc](https://typedoc.org/)
diff --git a/doc/quickjs-emscripten/classes/Lifetime.md b/doc/quickjs-emscripten/classes/Lifetime.md
index 62ec48a93..d263c8697 100644
--- a/doc/quickjs-emscripten/classes/Lifetime.md
+++ b/doc/quickjs-emscripten/classes/Lifetime.md
@@ -32,6 +32,7 @@ Typically, quickjs-emscripten uses Lifetimes to protect C memory pointers.
   - [value](Lifetime.md#value)
 - [Methods](Lifetime.md#methods)
   - [`[dispose]`()](Lifetime.md#dispose)
+  - [assertAlive()](Lifetime.md#assertalive)
   - [consume()](Lifetime.md#consume)
   - [dispose()](Lifetime.md#dispose)
   - [dup()](Lifetime.md#dup)
@@ -258,6 +259,20 @@ Just calls the standard .dispose() method of this class.
 
 ***
 
+### assertAlive()
+
+> **`protected`** **assertAlive**(): `void`
+
+#### Returns
+
+`void`
+
+#### Source
+
+[packages/quickjs-emscripten-core/src/lifetime.ts:182](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/lifetime.ts#L182)
+
+***
+
 ### consume()
 
 #### consume(map)
diff --git a/doc/quickjs-emscripten/classes/QuickJSAsyncContext.md b/doc/quickjs-emscripten/classes/QuickJSAsyncContext.md
index d5fdcc5b3..9326f9317 100644
--- a/doc/quickjs-emscripten/classes/QuickJSAsyncContext.md
+++ b/doc/quickjs-emscripten/classes/QuickJSAsyncContext.md
@@ -54,8 +54,11 @@ host functions as though they were synchronous.
   - [newArrayBuffer()](QuickJSAsyncContext.md#newarraybuffer)
   - [newAsyncifiedFunction()](QuickJSAsyncContext.md#newasyncifiedfunction)
   - [newBigInt()](QuickJSAsyncContext.md#newbigint)
+  - [newConstructorFunction()](QuickJSAsyncContext.md#newconstructorfunction)
   - [newError()](QuickJSAsyncContext.md#newerror)
   - [newFunction()](QuickJSAsyncContext.md#newfunction)
+  - [newFunctionWithOptions()](QuickJSAsyncContext.md#newfunctionwithoptions)
+  - [newHostRef()](QuickJSAsyncContext.md#newhostref)
   - [newNumber()](QuickJSAsyncContext.md#newnumber)
   - [newObject()](QuickJSAsyncContext.md#newobject)
   - [newPromise()](QuickJSAsyncContext.md#newpromise)
@@ -68,7 +71,9 @@ host functions as though they were synchronous.
   - [setProp()](QuickJSAsyncContext.md#setprop)
   - [success()](QuickJSAsyncContext.md#success)
   - [throw()](QuickJSAsyncContext.md#throw)
+  - [toHostRef()](QuickJSAsyncContext.md#tohostref)
   - [typeof()](QuickJSAsyncContext.md#typeof)
+  - [unwrapHostRef()](QuickJSAsyncContext.md#unwraphostref)
   - [unwrapResult()](QuickJSAsyncContext.md#unwrapresult)
 
 ## Extends
@@ -112,7 +117,7 @@ to create a new QuickJSContext.
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:224](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L224)
+[packages/quickjs-emscripten-core/src/context.ts:233](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L233)
 
 ## Properties
 
@@ -146,7 +151,7 @@ false after the object has been [dispose](QuickJSAsyncContext.md#dispose-1)d
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:255](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L255)
+[packages/quickjs-emscripten-core/src/context.ts:264](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L264)
 
 ***
 
@@ -162,7 +167,7 @@ false after the object has been [dispose](QuickJSAsyncContext.md#dispose-1)d
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:313](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L313)
+[packages/quickjs-emscripten-core/src/context.ts:322](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L322)
 
 ***
 
@@ -180,7 +185,7 @@ You can set properties to create global variables.
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:328](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L328)
+[packages/quickjs-emscripten-core/src/context.ts:337](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L337)
 
 ***
 
@@ -196,7 +201,7 @@ You can set properties to create global variables.
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:287](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L287)
+[packages/quickjs-emscripten-core/src/context.ts:296](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L296)
 
 ***
 
@@ -212,7 +217,7 @@ You can set properties to create global variables.
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:300](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L300)
+[packages/quickjs-emscripten-core/src/context.ts:309](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L309)
 
 ***
 
@@ -228,7 +233,7 @@ You can set properties to create global variables.
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:274](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L274)
+[packages/quickjs-emscripten-core/src/context.ts:283](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L283)
 
 ## Methods
 
@@ -298,7 +303,7 @@ console.log(context.dump(resultHandle)) // 42
 
 ##### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:1059](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L1059)
+[packages/quickjs-emscripten-core/src/context.ts:1180](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L1180)
 
 #### callFunction(func, thisVal, args)
 
@@ -322,7 +327,7 @@ console.log(context.dump(resultHandle)) // 42
 
 ##### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:1064](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L1064)
+[packages/quickjs-emscripten-core/src/context.ts:1185](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L1185)
 
 ***
 
@@ -356,7 +361,7 @@ value.
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:1113](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L1113)
+[packages/quickjs-emscripten-core/src/context.ts:1234](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L1234)
 
 ***
 
@@ -389,7 +394,7 @@ socket.on("data", chunk => {
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:1431](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L1431)
+[packages/quickjs-emscripten-core/src/context.ts:1530](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L1530)
 
 ***
 
@@ -420,7 +425,7 @@ Javascript string or number (which will be converted automatically to a JSValue)
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:1000](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L1000)
+[packages/quickjs-emscripten-core/src/context.ts:1121](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L1121)
 
 ***
 
@@ -445,7 +450,7 @@ will result in an error.
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:265](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L265)
+[packages/quickjs-emscripten-core/src/context.ts:274](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L274)
 
 ***
 
@@ -471,7 +476,7 @@ Returns `handle.toString()` if it cannot be serialized to JSON.
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:1234](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L1234)
+[packages/quickjs-emscripten-core/src/context.ts:1355](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L1355)
 
 ***
 
@@ -505,7 +510,7 @@ socket.write(dataLifetime?.value)
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:1414](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L1414)
+[packages/quickjs-emscripten-core/src/context.ts:1513](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L1513)
 
 ***
 
@@ -532,7 +537,7 @@ See [Equality comparisons and sameness](https://developer.mozilla.org/en-US/docs
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:811](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L811)
+[packages/quickjs-emscripten-core/src/context.ts:932](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L932)
 
 ***
 
@@ -595,7 +600,7 @@ interrupted, the error will have name `InternalError` and message
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:1156](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L1156)
+[packages/quickjs-emscripten-core/src/context.ts:1277](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L1277)
 
 ***
 
@@ -643,7 +648,7 @@ See [EvalFlags](../exports.md#evalflags) for number semantics
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:1440](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L1440)
+[packages/quickjs-emscripten-core/src/context.ts:1539](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L1539)
 
 ***
 
@@ -667,7 +672,7 @@ Coverts `handle` to a JavaScript ArrayBuffer
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:690](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L690)
+[packages/quickjs-emscripten-core/src/context.ts:811](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L811)
 
 ***
 
@@ -691,7 +696,7 @@ Converts `handle` to a Javascript bigint.
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:681](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L681)
+[packages/quickjs-emscripten-core/src/context.ts:802](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L802)
 
 ***
 
@@ -727,7 +732,7 @@ for (using entriesHandle of context.getIterator(mapHandle).unwrap()) {
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:960](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L960)
+[packages/quickjs-emscripten-core/src/context.ts:1081](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L1081)
 
 ***
 
@@ -762,7 +767,7 @@ a number if the handle has a numeric length property, otherwise `undefined`.
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:870](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L870)
+[packages/quickjs-emscripten-core/src/context.ts:991](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L991)
 
 ***
 
@@ -788,7 +793,7 @@ Converts `handle` into a Javascript number.
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:652](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L652)
+[packages/quickjs-emscripten-core/src/context.ts:773](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L773)
 
 ***
 
@@ -842,7 +847,7 @@ QuickJSEmptyGetOwnPropertyNames if no options are set.
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:907](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L907)
+[packages/quickjs-emscripten-core/src/context.ts:1028](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L1028)
 
 ***
 
@@ -876,7 +881,7 @@ resultHandle.dispose();
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:715](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L715)
+[packages/quickjs-emscripten-core/src/context.ts:836](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L836)
 
 ***
 
@@ -906,7 +911,7 @@ Javascript string (which will be converted automatically).
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:840](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L840)
+[packages/quickjs-emscripten-core/src/context.ts:961](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L961)
 
 ***
 
@@ -930,7 +935,7 @@ Converts `handle` to a Javascript string.
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:660](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L660)
+[packages/quickjs-emscripten-core/src/context.ts:781](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L781)
 
 ***
 
@@ -955,7 +960,7 @@ registry in the guest, it will be created with Symbol.for on the host.
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:669](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L669)
+[packages/quickjs-emscripten-core/src/context.ts:790](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L790)
 
 ***
 
@@ -979,7 +984,7 @@ Access a well-known symbol that is a property of the global Symbol object, like
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:388](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L388)
+[packages/quickjs-emscripten-core/src/context.ts:397](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L397)
 
 ***
 
@@ -1000,7 +1005,7 @@ Create a new QuickJS [array](https://developer.mozilla.org/en-US/docs/Web/JavaSc
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:430](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L430)
+[packages/quickjs-emscripten-core/src/context.ts:439](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L439)
 
 ***
 
@@ -1024,7 +1029,7 @@ Create a new QuickJS [ArrayBuffer](https://developer.mozilla.org/en-US/docs/Web/
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:438](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L438)
+[packages/quickjs-emscripten-core/src/context.ts:447](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L447)
 
 ***
 
@@ -1080,7 +1085,56 @@ Create a QuickJS [bigint](https://developer.mozilla.org/en-US/docs/Web/JavaScrip
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:396](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L396)
+[packages/quickjs-emscripten-core/src/context.ts:405](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L405)
+
+***
+
+### newConstructorFunction()
+
+#### newConstructorFunction(fn)
+
+> **newConstructorFunction**(`fn`): [`QuickJSHandle`](../exports.md#quickjshandle)
+
+Convert a Javascript function into a QuickJS constructor function.
+See [newFunction](QuickJSAsyncContext.md#newfunction) for more details.
+
+##### Parameters
+
+• **fn**: [`VmFunctionImplementation`](../exports.md#vmfunctionimplementationvmhandle)\<[`QuickJSHandle`](../exports.md#quickjshandle)\>
+
+##### Returns
+
+[`QuickJSHandle`](../exports.md#quickjshandle)
+
+##### Inherited from
+
+[`quickjs-emscripten.QuickJSContext.newConstructorFunction`](QuickJSContext.md#newconstructorfunction)
+
+##### Source
+
+[packages/quickjs-emscripten-core/src/context.ts:635](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L635)
+
+#### newConstructorFunction(name, fn)
+
+> **newConstructorFunction**(`name`, `fn`): [`QuickJSHandle`](../exports.md#quickjshandle)
+
+##### Parameters
+
+• **name**: `undefined` \| `string`
+
+• **fn**: [`VmFunctionImplementation`](../exports.md#vmfunctionimplementationvmhandle)\<[`QuickJSHandle`](../exports.md#quickjshandle)\>
+
+##### Returns
+
+[`QuickJSHandle`](../exports.md#quickjshandle)
+
+##### Inherited from
+
+[`quickjs-emscripten.QuickJSContext.newConstructorFunction`](QuickJSContext.md#newconstructorfunction)
+
+##### Source
+
+[packages/quickjs-emscripten-core/src/context.ts:636](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L636)
 
 ***
 
@@ -1108,7 +1162,7 @@ Create a QuickJS [bigint](https://developer.mozilla.org/en-US/docs/Web/JavaScrip
 
 ##### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:607](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L607)
+[packages/quickjs-emscripten-core/src/context.ts:679](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L679)
 
 #### newError(message)
 
@@ -1128,7 +1182,7 @@ Create a QuickJS [bigint](https://developer.mozilla.org/en-US/docs/Web/JavaScrip
 
 ##### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:608](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L608)
+[packages/quickjs-emscripten-core/src/context.ts:680](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L680)
 
 #### newError(undefined)
 
@@ -1144,13 +1198,15 @@ Create a QuickJS [bigint](https://developer.mozilla.org/en-US/docs/Web/JavaScrip
 
 ##### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:609](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L609)
+[packages/quickjs-emscripten-core/src/context.ts:681](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L681)
 
 ***
 
 ### newFunction()
 
-> **newFunction**(`name`, `fn`): [`QuickJSHandle`](../exports.md#quickjshandle)
+#### newFunction(fn)
+
+> **newFunction**(`fn`): [`QuickJSHandle`](../exports.md#quickjshandle)
 
 Convert a Javascript function into a QuickJS function value.
 See [VmFunctionImplementation](../exports.md#vmfunctionimplementationvmhandle) for more details.
@@ -1159,6 +1215,8 @@ A [VmFunctionImplementation](../exports.md#vmfunctionimplementationvmhandle) sho
 value. A VmFunctionImplementation should also not retain any references to
 its return value.
 
+For constructors (functions that will be called with `new ...`), use [newConstructorFunction](QuickJSAsyncContext.md#newconstructorfunction).
+
 The function argument handles are automatically disposed when the function
 returns. If you want to retain a handle beyond the end of the function, you
 can call [Lifetime#dup](Lifetime.md#dup) to create a copy of the handle that you own
@@ -1245,23 +1303,110 @@ someNativeAsyncFunction().then(deferred.resolve)
 return deferred.handle
 ```
 
-#### Parameters
+##### Parameters
 
-• **name**: `string`
+• **fn**: [`VmFunctionImplementation`](../exports.md#vmfunctionimplementationvmhandle)\<[`QuickJSHandle`](../exports.md#quickjshandle)\>
+
+##### Returns
+
+[`QuickJSHandle`](../exports.md#quickjshandle)
+
+##### Inherited from
+
+[`quickjs-emscripten.QuickJSContext.newFunction`](QuickJSContext.md#newfunction)
+
+##### Source
+
+[packages/quickjs-emscripten-core/src/context.ts:612](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L612)
+
+#### newFunction(name, fn)
+
+> **newFunction**(`name`, `fn`): [`QuickJSHandle`](../exports.md#quickjshandle)
+
+##### Parameters
+
+• **name**: `undefined` \| `string`
 
 • **fn**: [`VmFunctionImplementation`](../exports.md#vmfunctionimplementationvmhandle)\<[`QuickJSHandle`](../exports.md#quickjshandle)\>
 
+##### Returns
+
+[`QuickJSHandle`](../exports.md#quickjshandle)
+
+##### Inherited from
+
+[`quickjs-emscripten.QuickJSContext.newFunction`](QuickJSContext.md#newfunction)
+
+##### Source
+
+[packages/quickjs-emscripten-core/src/context.ts:613](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L613)
+
+***
+
+### newFunctionWithOptions()
+
+> **newFunctionWithOptions**(`args`): [`QuickJSHandle`](../exports.md#quickjshandle)
+
+Lower-level API for creating functions.
+See [newFunction](QuickJSAsyncContext.md#newfunction) for more details on how to use functions.
+
+#### Parameters
+
+• **args**: `Object`
+
+• **args\.fn**: [`VmFunctionImplementation`](../exports.md#vmfunctionimplementationvmhandle)\<[`QuickJSHandle`](../exports.md#quickjshandle)\>
+
+• **args\.isConstructor**: `boolean`
+
+• **args\.length**: `number`
+
+• **args\.name**: `undefined` \| `string`
+
 #### Returns
 
 [`QuickJSHandle`](../exports.md#quickjshandle)
 
 #### Inherited from
 
-[`quickjs-emscripten.QuickJSContext.newFunction`](QuickJSContext.md#newfunction)
+[`quickjs-emscripten.QuickJSContext.newFunctionWithOptions`](QuickJSContext.md#newfunctionwithoptions)
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:601](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L601)
+[packages/quickjs-emscripten-core/src/context.ts:661](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L661)
+
+***
+
+### newHostRef()
+
+> **newHostRef**\<`T`\>(`value`): `HostRef`\<`T`\>
+
+Create an opaque handle object that stores a reference to a host JavaScript object.
+
+The guest cannot access the host object directly, but you may use
+getHostRef to convert a HostRef handle back into a HostRef`<T>`  from
+inside a function implementation.
+
+You must call [HostRef#dispose]([object Object]) or otherwise consume the [HostRef#handle]([object Object]) to ensure the handle is not leaked.
+
+#### Type parameters
+
+• **T** extends `object`
+
+#### Parameters
+
+• **value**: `T`
+
+#### Returns
+
+`HostRef`\<`T`\>
+
+#### Inherited from
+
+[`quickjs-emscripten.QuickJSContext.newHostRef`](QuickJSContext.md#newhostref)
+
+#### Source
+
+[packages/quickjs-emscripten-core/src/context.ts:716](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L716)
 
 ***
 
@@ -1285,7 +1430,7 @@ Converts a Javascript number into a QuickJS value.
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:347](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L347)
+[packages/quickjs-emscripten-core/src/context.ts:356](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L356)
 
 ***
 
@@ -1312,7 +1457,7 @@ Like [`Object.create`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/R
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:416](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L416)
+[packages/quickjs-emscripten-core/src/context.ts:425](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L425)
 
 ***
 
@@ -1337,7 +1482,7 @@ resources; see the documentation on [QuickJSDeferredPromise](QuickJSDeferredProm
 
 ##### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:451](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L451)
+[packages/quickjs-emscripten-core/src/context.ts:460](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L460)
 
 #### newPromise(promise)
 
@@ -1363,7 +1508,7 @@ You can still resolve/reject the created promise "early" using its methods.
 
 ##### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:459](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L459)
+[packages/quickjs-emscripten-core/src/context.ts:468](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L468)
 
 #### newPromise(newPromiseFn)
 
@@ -1388,7 +1533,7 @@ You can still resolve/reject the created promise "early" using its methods.
 
 ##### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:466](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L466)
+[packages/quickjs-emscripten-core/src/context.ts:475](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L475)
 
 ***
 
@@ -1412,7 +1557,7 @@ Create a QuickJS [string](https://developer.mozilla.org/en-US/docs/Web/JavaScrip
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:354](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L354)
+[packages/quickjs-emscripten-core/src/context.ts:363](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L363)
 
 ***
 
@@ -1437,7 +1582,7 @@ All symbols created with the same key will be the same value.
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:377](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L377)
+[packages/quickjs-emscripten-core/src/context.ts:386](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L386)
 
 ***
 
@@ -1462,7 +1607,7 @@ No two symbols created with this function will be the same value.
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:365](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L365)
+[packages/quickjs-emscripten-core/src/context.ts:374](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L374)
 
 ***
 
@@ -1494,7 +1639,7 @@ You may need to call [runtime](QuickJSAsyncContext.md#runtime).[QuickJSRuntime#e
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:754](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L754)
+[packages/quickjs-emscripten-core/src/context.ts:875](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L875)
 
 ***
 
@@ -1521,7 +1666,7 @@ See [Equality comparisons and sameness](https://developer.mozilla.org/en-US/docs
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:819](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L819)
+[packages/quickjs-emscripten-core/src/context.ts:940](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L940)
 
 ***
 
@@ -1548,7 +1693,7 @@ See [Equality comparisons and sameness](https://developer.mozilla.org/en-US/docs
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:827](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L827)
+[packages/quickjs-emscripten-core/src/context.ts:948](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L948)
 
 ***
 
@@ -1585,7 +1730,7 @@ properties.
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:985](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L985)
+[packages/quickjs-emscripten-core/src/context.ts:1106](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L1106)
 
 ***
 
@@ -1611,7 +1756,7 @@ properties.
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:1436](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L1436)
+[packages/quickjs-emscripten-core/src/context.ts:1535](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L1535)
 
 ***
 
@@ -1635,7 +1780,37 @@ Throw an error in the VM, interrupted whatever current execution is in progress
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:1193](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L1193)
+[packages/quickjs-emscripten-core/src/context.ts:1314](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L1314)
+
+***
+
+### toHostRef()
+
+> **toHostRef**\<`T`\>(`handle`): `undefined` \| `HostRef`\<`T`\>
+
+If `handle` is a `HostRef<T>.handle`, return a new `HostRef<T>` instance wrapping the handle.
+
+You must call [HostRef#dispose]([object Object]) or otherwise consume the [HostRef#handle]([object Object]) to ensure the handle is not leaked.
+
+#### Type parameters
+
+• **T** extends `object`
+
+#### Parameters
+
+• **handle**: [`QuickJSHandle`](../exports.md#quickjshandle)
+
+#### Returns
+
+`undefined` \| `HostRef`\<`T`\>
+
+#### Inherited from
+
+[`quickjs-emscripten.QuickJSContext.toHostRef`](QuickJSContext.md#tohostref)
+
+#### Source
+
+[packages/quickjs-emscripten-core/src/context.ts:732](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L732)
 
 ***
 
@@ -1663,7 +1838,39 @@ Does not support BigInt values correctly.
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:643](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L643)
+[packages/quickjs-emscripten-core/src/context.ts:764](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L764)
+
+***
+
+### unwrapHostRef()
+
+> **unwrapHostRef**\<`T`\>(`handle`): `T`
+
+If `handle` is a `HostRef<T>.handle`, return the host value `T`.
+
+#### Type parameters
+
+• **T** extends `object`
+
+#### Parameters
+
+• **handle**: [`QuickJSHandle`](../exports.md#quickjshandle)
+
+#### Returns
+
+`T`
+
+#### Inherited from
+
+[`quickjs-emscripten.QuickJSContext.unwrapHostRef`](QuickJSContext.md#unwraphostref)
+
+#### Throws
+
+QuickJSHostRefInvalid if `handle` is not a `HostRef<T>.handle`
+
+#### Source
+
+[packages/quickjs-emscripten-core/src/context.ts:747](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L747)
 
 ***
 
@@ -1694,7 +1901,7 @@ If the result is an error, converts the error to a native object and throws the
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:1277](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L1277)
+[packages/quickjs-emscripten-core/src/context.ts:1398](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L1398)
 
 ***
 
diff --git a/doc/quickjs-emscripten/classes/QuickJSAsyncRuntime.md b/doc/quickjs-emscripten/classes/QuickJSAsyncRuntime.md
index 1167449a2..eb9a422bd 100644
--- a/doc/quickjs-emscripten/classes/QuickJSAsyncRuntime.md
+++ b/doc/quickjs-emscripten/classes/QuickJSAsyncRuntime.md
@@ -96,7 +96,7 @@ false after the object has been [dispose](QuickJSAsyncRuntime.md#dispose-1)d
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/runtime.ts:125](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/runtime.ts#L125)
+[packages/quickjs-emscripten-core/src/runtime.ts:128](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/runtime.ts#L128)
 
 ## Methods
 
@@ -144,7 +144,7 @@ QuickJSWrongOwner if owned by a different runtime.
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/runtime.ts:327](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/runtime.ts#L327)
+[packages/quickjs-emscripten-core/src/runtime.ts:330](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/runtime.ts#L330)
 
 ***
 
@@ -168,7 +168,7 @@ For a human-digestible representation, see [dumpMemoryUsage](QuickJSAsyncRuntime
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/runtime.ts:296](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/runtime.ts#L296)
+[packages/quickjs-emscripten-core/src/runtime.ts:299](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/runtime.ts#L299)
 
 ***
 
@@ -195,7 +195,7 @@ manipulation if debug logging is disabled.
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/runtime.ts:363](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/runtime.ts#L363)
+[packages/quickjs-emscripten-core/src/runtime.ts:366](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/runtime.ts#L366)
 
 ***
 
@@ -215,7 +215,7 @@ Dispose of the underlying resources used by this object.
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/runtime.ts:129](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/runtime.ts#L129)
+[packages/quickjs-emscripten-core/src/runtime.ts:132](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/runtime.ts#L132)
 
 ***
 
@@ -236,7 +236,7 @@ For programmatic access to this information, see [computeMemoryUsage](QuickJSAsy
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/runtime.ts:307](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/runtime.ts#L307)
+[packages/quickjs-emscripten-core/src/runtime.ts:310](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/runtime.ts#L310)
 
 ***
 
@@ -274,7 +274,7 @@ functions or rejected promises. Those errors are available by calling
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/runtime.ts:243](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/runtime.ts#L243)
+[packages/quickjs-emscripten-core/src/runtime.ts:246](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/runtime.ts#L246)
 
 ***
 
@@ -297,7 +297,7 @@ true if there is at least one pendingJob queued up.
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/runtime.ts:194](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/runtime.ts#L194)
+[packages/quickjs-emscripten-core/src/runtime.ts:197](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/runtime.ts#L197)
 
 ***
 
@@ -317,7 +317,7 @@ true if debug logging is enabled
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/runtime.ts:353](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/runtime.ts#L353)
+[packages/quickjs-emscripten-core/src/runtime.ts:356](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/runtime.ts#L356)
 
 ***
 
@@ -366,7 +366,7 @@ See [setInterruptHandler](QuickJSAsyncRuntime.md#setinterrupthandler).
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/runtime.ts:219](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/runtime.ts#L219)
+[packages/quickjs-emscripten-core/src/runtime.ts:222](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/runtime.ts#L222)
 
 ***
 
@@ -386,7 +386,7 @@ Remove the the loader set by [setModuleLoader](QuickJSAsyncRuntime.md#setmodulel
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/runtime.ts:181](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/runtime.ts#L181)
+[packages/quickjs-emscripten-core/src/runtime.ts:184](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/runtime.ts#L184)
 
 ***
 
@@ -413,7 +413,7 @@ code.
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/runtime.ts:343](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/runtime.ts#L343)
+[packages/quickjs-emscripten-core/src/runtime.ts:346](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/runtime.ts#L346)
 
 ***
 
@@ -441,7 +441,7 @@ The interrupt handler can be removed with [removeInterruptHandler](QuickJSAsyncR
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/runtime.ts:207](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/runtime.ts#L207)
+[packages/quickjs-emscripten-core/src/runtime.ts:210](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/runtime.ts#L210)
 
 ***
 
@@ -494,7 +494,7 @@ To remove the limit, set to `-1`.
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/runtime.ts:281](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/runtime.ts#L281)
+[packages/quickjs-emscripten-core/src/runtime.ts:284](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/runtime.ts#L284)
 
 ***
 
diff --git a/doc/quickjs-emscripten/classes/QuickJSAsyncWASMModule.md b/doc/quickjs-emscripten/classes/QuickJSAsyncWASMModule.md
index bdbe26f6c..d7ba40d81 100644
--- a/doc/quickjs-emscripten/classes/QuickJSAsyncWASMModule.md
+++ b/doc/quickjs-emscripten/classes/QuickJSAsyncWASMModule.md
@@ -104,7 +104,7 @@ and provide the [CustomizeVariantOptions#wasmMemory](../interfaces/CustomizeVari
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/module.ts:426](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/module.ts#L426)
+[packages/quickjs-emscripten-core/src/module.ts:441](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/module.ts#L441)
 
 ***
 
diff --git a/doc/quickjs-emscripten/classes/QuickJSContext.md b/doc/quickjs-emscripten/classes/QuickJSContext.md
index 00d400b92..4f9672697 100644
--- a/doc/quickjs-emscripten/classes/QuickJSContext.md
+++ b/doc/quickjs-emscripten/classes/QuickJSContext.md
@@ -77,8 +77,11 @@ See [QuickJSRuntime](QuickJSRuntime.md) for more information.
   - [newArray()](QuickJSContext.md#newarray)
   - [newArrayBuffer()](QuickJSContext.md#newarraybuffer)
   - [newBigInt()](QuickJSContext.md#newbigint)
+  - [newConstructorFunction()](QuickJSContext.md#newconstructorfunction)
   - [newError()](QuickJSContext.md#newerror)
   - [newFunction()](QuickJSContext.md#newfunction)
+  - [newFunctionWithOptions()](QuickJSContext.md#newfunctionwithoptions)
+  - [newHostRef()](QuickJSContext.md#newhostref)
   - [newNumber()](QuickJSContext.md#newnumber)
   - [newObject()](QuickJSContext.md#newobject)
   - [newPromise()](QuickJSContext.md#newpromise)
@@ -91,7 +94,9 @@ See [QuickJSRuntime](QuickJSRuntime.md) for more information.
   - [setProp()](QuickJSContext.md#setprop)
   - [success()](QuickJSContext.md#success)
   - [throw()](QuickJSContext.md#throw)
+  - [toHostRef()](QuickJSContext.md#tohostref)
   - [typeof()](QuickJSContext.md#typeof)
+  - [unwrapHostRef()](QuickJSContext.md#unwraphostref)
   - [unwrapResult()](QuickJSContext.md#unwrapresult)
 
 ## Extends
@@ -140,7 +145,7 @@ to create a new QuickJSContext.
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:224](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L224)
+[packages/quickjs-emscripten-core/src/context.ts:233](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L233)
 
 ## Properties
 
@@ -152,7 +157,7 @@ The runtime that created this context.
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:186](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L186)
+[packages/quickjs-emscripten-core/src/context.ts:195](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L195)
 
 ## Accessors
 
@@ -170,7 +175,7 @@ false after the object has been [dispose](QuickJSContext.md#dispose-1)d
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:255](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L255)
+[packages/quickjs-emscripten-core/src/context.ts:264](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L264)
 
 ***
 
@@ -186,7 +191,7 @@ false after the object has been [dispose](QuickJSContext.md#dispose-1)d
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:313](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L313)
+[packages/quickjs-emscripten-core/src/context.ts:322](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L322)
 
 ***
 
@@ -204,7 +209,7 @@ You can set properties to create global variables.
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:328](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L328)
+[packages/quickjs-emscripten-core/src/context.ts:337](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L337)
 
 ***
 
@@ -220,7 +225,7 @@ You can set properties to create global variables.
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:287](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L287)
+[packages/quickjs-emscripten-core/src/context.ts:296](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L296)
 
 ***
 
@@ -236,7 +241,7 @@ You can set properties to create global variables.
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:300](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L300)
+[packages/quickjs-emscripten-core/src/context.ts:309](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L309)
 
 ***
 
@@ -252,7 +257,7 @@ You can set properties to create global variables.
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:274](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L274)
+[packages/quickjs-emscripten-core/src/context.ts:283](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L283)
 
 ## Methods
 
@@ -326,7 +331,7 @@ console.log(context.dump(resultHandle)) // 42
 
 ##### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:1059](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L1059)
+[packages/quickjs-emscripten-core/src/context.ts:1180](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L1180)
 
 #### callFunction(func, thisVal, args)
 
@@ -350,7 +355,7 @@ console.log(context.dump(resultHandle)) // 42
 
 ##### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:1064](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L1064)
+[packages/quickjs-emscripten-core/src/context.ts:1185](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L1185)
 
 ***
 
@@ -380,7 +385,7 @@ value.
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:1113](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L1113)
+[packages/quickjs-emscripten-core/src/context.ts:1234](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L1234)
 
 ***
 
@@ -409,7 +414,7 @@ socket.on("data", chunk => {
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:1431](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L1431)
+[packages/quickjs-emscripten-core/src/context.ts:1530](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L1530)
 
 ***
 
@@ -440,7 +445,7 @@ Javascript string or number (which will be converted automatically to a JSValue)
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:1000](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L1000)
+[packages/quickjs-emscripten-core/src/context.ts:1121](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L1121)
 
 ***
 
@@ -469,7 +474,7 @@ will result in an error.
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:265](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L265)
+[packages/quickjs-emscripten-core/src/context.ts:274](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L274)
 
 ***
 
@@ -491,7 +496,7 @@ Returns `handle.toString()` if it cannot be serialized to JSON.
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:1234](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L1234)
+[packages/quickjs-emscripten-core/src/context.ts:1355](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L1355)
 
 ***
 
@@ -521,7 +526,7 @@ socket.write(dataLifetime?.value)
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:1414](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L1414)
+[packages/quickjs-emscripten-core/src/context.ts:1513](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L1513)
 
 ***
 
@@ -544,7 +549,7 @@ See [Equality comparisons and sameness](https://developer.mozilla.org/en-US/docs
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:811](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L811)
+[packages/quickjs-emscripten-core/src/context.ts:932](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L932)
 
 ***
 
@@ -607,7 +612,7 @@ interrupted, the error will have name `InternalError` and message
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:1156](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L1156)
+[packages/quickjs-emscripten-core/src/context.ts:1277](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L1277)
 
 ***
 
@@ -625,7 +630,7 @@ interrupted, the error will have name `InternalError` and message
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:1440](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L1440)
+[packages/quickjs-emscripten-core/src/context.ts:1539](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L1539)
 
 ***
 
@@ -645,7 +650,7 @@ Coverts `handle` to a JavaScript ArrayBuffer
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:690](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L690)
+[packages/quickjs-emscripten-core/src/context.ts:811](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L811)
 
 ***
 
@@ -665,7 +670,7 @@ Converts `handle` to a Javascript bigint.
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:681](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L681)
+[packages/quickjs-emscripten-core/src/context.ts:802](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L802)
 
 ***
 
@@ -697,7 +702,7 @@ for (using entriesHandle of context.getIterator(mapHandle).unwrap()) {
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:960](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L960)
+[packages/quickjs-emscripten-core/src/context.ts:1081](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L1081)
 
 ***
 
@@ -728,7 +733,7 @@ a number if the handle has a numeric length property, otherwise `undefined`.
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:870](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L870)
+[packages/quickjs-emscripten-core/src/context.ts:991](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L991)
 
 ***
 
@@ -754,7 +759,7 @@ Converts `handle` into a Javascript number.
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:652](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L652)
+[packages/quickjs-emscripten-core/src/context.ts:773](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L773)
 
 ***
 
@@ -804,7 +809,7 @@ QuickJSEmptyGetOwnPropertyNames if no options are set.
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:907](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L907)
+[packages/quickjs-emscripten-core/src/context.ts:1028](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L1028)
 
 ***
 
@@ -834,7 +839,7 @@ resultHandle.dispose();
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:715](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L715)
+[packages/quickjs-emscripten-core/src/context.ts:836](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L836)
 
 ***
 
@@ -864,7 +869,7 @@ Javascript string (which will be converted automatically).
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:840](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L840)
+[packages/quickjs-emscripten-core/src/context.ts:961](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L961)
 
 ***
 
@@ -888,7 +893,7 @@ Converts `handle` to a Javascript string.
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:660](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L660)
+[packages/quickjs-emscripten-core/src/context.ts:781](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L781)
 
 ***
 
@@ -909,7 +914,7 @@ registry in the guest, it will be created with Symbol.for on the host.
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:669](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L669)
+[packages/quickjs-emscripten-core/src/context.ts:790](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L790)
 
 ***
 
@@ -929,7 +934,7 @@ Access a well-known symbol that is a property of the global Symbol object, like
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:388](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L388)
+[packages/quickjs-emscripten-core/src/context.ts:397](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L397)
 
 ***
 
@@ -946,7 +951,7 @@ Create a new QuickJS [array](https://developer.mozilla.org/en-US/docs/Web/JavaSc
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:430](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L430)
+[packages/quickjs-emscripten-core/src/context.ts:439](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L439)
 
 ***
 
@@ -966,7 +971,7 @@ Create a new QuickJS [ArrayBuffer](https://developer.mozilla.org/en-US/docs/Web/
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:438](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L438)
+[packages/quickjs-emscripten-core/src/context.ts:447](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L447)
 
 ***
 
@@ -986,7 +991,48 @@ Create a QuickJS [bigint](https://developer.mozilla.org/en-US/docs/Web/JavaScrip
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:396](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L396)
+[packages/quickjs-emscripten-core/src/context.ts:405](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L405)
+
+***
+
+### newConstructorFunction()
+
+#### newConstructorFunction(fn)
+
+> **newConstructorFunction**(`fn`): [`QuickJSHandle`](../exports.md#quickjshandle)
+
+Convert a Javascript function into a QuickJS constructor function.
+See [newFunction](QuickJSContext.md#newfunction) for more details.
+
+##### Parameters
+
+• **fn**: [`VmFunctionImplementation`](../exports.md#vmfunctionimplementationvmhandle)\<[`QuickJSHandle`](../exports.md#quickjshandle)\>
+
+##### Returns
+
+[`QuickJSHandle`](../exports.md#quickjshandle)
+
+##### Source
+
+[packages/quickjs-emscripten-core/src/context.ts:635](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L635)
+
+#### newConstructorFunction(name, fn)
+
+> **newConstructorFunction**(`name`, `fn`): [`QuickJSHandle`](../exports.md#quickjshandle)
+
+##### Parameters
+
+• **name**: `undefined` \| `string`
+
+• **fn**: [`VmFunctionImplementation`](../exports.md#vmfunctionimplementationvmhandle)\<[`QuickJSHandle`](../exports.md#quickjshandle)\>
+
+##### Returns
+
+[`QuickJSHandle`](../exports.md#quickjshandle)
+
+##### Source
+
+[packages/quickjs-emscripten-core/src/context.ts:636](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L636)
 
 ***
 
@@ -1010,7 +1056,7 @@ Create a QuickJS [bigint](https://developer.mozilla.org/en-US/docs/Web/JavaScrip
 
 ##### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:607](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L607)
+[packages/quickjs-emscripten-core/src/context.ts:679](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L679)
 
 #### newError(message)
 
@@ -1026,7 +1072,7 @@ Create a QuickJS [bigint](https://developer.mozilla.org/en-US/docs/Web/JavaScrip
 
 ##### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:608](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L608)
+[packages/quickjs-emscripten-core/src/context.ts:680](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L680)
 
 #### newError(undefined)
 
@@ -1038,13 +1084,15 @@ Create a QuickJS [bigint](https://developer.mozilla.org/en-US/docs/Web/JavaScrip
 
 ##### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:609](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L609)
+[packages/quickjs-emscripten-core/src/context.ts:681](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L681)
 
 ***
 
 ### newFunction()
 
-> **newFunction**(`name`, `fn`): [`QuickJSHandle`](../exports.md#quickjshandle)
+#### newFunction(fn)
+
+> **newFunction**(`fn`): [`QuickJSHandle`](../exports.md#quickjshandle)
 
 Convert a Javascript function into a QuickJS function value.
 See [VmFunctionImplementation](../exports.md#vmfunctionimplementationvmhandle) for more details.
@@ -1053,6 +1101,8 @@ A [VmFunctionImplementation](../exports.md#vmfunctionimplementationvmhandle) sho
 value. A VmFunctionImplementation should also not retain any references to
 its return value.
 
+For constructors (functions that will be called with `new ...`), use [newConstructorFunction](QuickJSContext.md#newconstructorfunction).
+
 The function argument handles are automatically disposed when the function
 returns. If you want to retain a handle beyond the end of the function, you
 can call [Lifetime#dup](Lifetime.md#dup) to create a copy of the handle that you own
@@ -1139,23 +1189,102 @@ someNativeAsyncFunction().then(deferred.resolve)
 return deferred.handle
 ```
 
-#### Parameters
+##### Parameters
 
-• **name**: `string`
+• **fn**: [`VmFunctionImplementation`](../exports.md#vmfunctionimplementationvmhandle)\<[`QuickJSHandle`](../exports.md#quickjshandle)\>
+
+##### Returns
+
+[`QuickJSHandle`](../exports.md#quickjshandle)
+
+##### Implementation of
+
+[`quickjs-emscripten.LowLevelJavascriptVm.newFunction`](../interfaces/LowLevelJavascriptVm.md#newfunction)
+
+##### Source
+
+[packages/quickjs-emscripten-core/src/context.ts:612](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L612)
+
+#### newFunction(name, fn)
+
+> **newFunction**(`name`, `fn`): [`QuickJSHandle`](../exports.md#quickjshandle)
+
+##### Parameters
+
+• **name**: `undefined` \| `string`
 
 • **fn**: [`VmFunctionImplementation`](../exports.md#vmfunctionimplementationvmhandle)\<[`QuickJSHandle`](../exports.md#quickjshandle)\>
 
+##### Returns
+
+[`QuickJSHandle`](../exports.md#quickjshandle)
+
+##### Implementation of
+
+`LowLevelJavascriptVm.newFunction`
+
+##### Source
+
+[packages/quickjs-emscripten-core/src/context.ts:613](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L613)
+
+***
+
+### newFunctionWithOptions()
+
+> **newFunctionWithOptions**(`args`): [`QuickJSHandle`](../exports.md#quickjshandle)
+
+Lower-level API for creating functions.
+See [newFunction](QuickJSContext.md#newfunction) for more details on how to use functions.
+
+#### Parameters
+
+• **args**: `Object`
+
+• **args\.fn**: [`VmFunctionImplementation`](../exports.md#vmfunctionimplementationvmhandle)\<[`QuickJSHandle`](../exports.md#quickjshandle)\>
+
+• **args\.isConstructor**: `boolean`
+
+• **args\.length**: `number`
+
+• **args\.name**: `undefined` \| `string`
+
 #### Returns
 
 [`QuickJSHandle`](../exports.md#quickjshandle)
 
-#### Implementation of
+#### Source
 
-[`quickjs-emscripten.LowLevelJavascriptVm.newFunction`](../interfaces/LowLevelJavascriptVm.md#newfunction)
+[packages/quickjs-emscripten-core/src/context.ts:661](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L661)
+
+***
+
+### newHostRef()
+
+> **newHostRef**\<`T`\>(`value`): `HostRef`\<`T`\>
+
+Create an opaque handle object that stores a reference to a host JavaScript object.
+
+The guest cannot access the host object directly, but you may use
+getHostRef to convert a HostRef handle back into a HostRef`<T>`  from
+inside a function implementation.
+
+You must call [HostRef#dispose]([object Object]) or otherwise consume the [HostRef#handle]([object Object]) to ensure the handle is not leaked.
+
+#### Type parameters
+
+• **T** extends `object`
+
+#### Parameters
+
+• **value**: `T`
+
+#### Returns
+
+`HostRef`\<`T`\>
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:601](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L601)
+[packages/quickjs-emscripten-core/src/context.ts:716](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L716)
 
 ***
 
@@ -1179,7 +1308,7 @@ Converts a Javascript number into a QuickJS value.
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:347](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L347)
+[packages/quickjs-emscripten-core/src/context.ts:356](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L356)
 
 ***
 
@@ -1206,7 +1335,7 @@ Like [`Object.create`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/R
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:416](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L416)
+[packages/quickjs-emscripten-core/src/context.ts:425](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L425)
 
 ***
 
@@ -1227,7 +1356,7 @@ resources; see the documentation on [QuickJSDeferredPromise](QuickJSDeferredProm
 
 ##### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:451](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L451)
+[packages/quickjs-emscripten-core/src/context.ts:460](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L460)
 
 #### newPromise(promise)
 
@@ -1249,7 +1378,7 @@ You can still resolve/reject the created promise "early" using its methods.
 
 ##### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:459](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L459)
+[packages/quickjs-emscripten-core/src/context.ts:468](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L468)
 
 #### newPromise(newPromiseFn)
 
@@ -1270,7 +1399,7 @@ You can still resolve/reject the created promise "early" using its methods.
 
 ##### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:466](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L466)
+[packages/quickjs-emscripten-core/src/context.ts:475](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L475)
 
 ***
 
@@ -1294,7 +1423,7 @@ Create a QuickJS [string](https://developer.mozilla.org/en-US/docs/Web/JavaScrip
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:354](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L354)
+[packages/quickjs-emscripten-core/src/context.ts:363](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L363)
 
 ***
 
@@ -1315,7 +1444,7 @@ All symbols created with the same key will be the same value.
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:377](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L377)
+[packages/quickjs-emscripten-core/src/context.ts:386](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L386)
 
 ***
 
@@ -1336,7 +1465,7 @@ No two symbols created with this function will be the same value.
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:365](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L365)
+[packages/quickjs-emscripten-core/src/context.ts:374](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L374)
 
 ***
 
@@ -1364,7 +1493,7 @@ You may need to call [runtime](QuickJSContext.md#runtime).[QuickJSRuntime#execut
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:754](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L754)
+[packages/quickjs-emscripten-core/src/context.ts:875](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L875)
 
 ***
 
@@ -1387,7 +1516,7 @@ See [Equality comparisons and sameness](https://developer.mozilla.org/en-US/docs
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:819](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L819)
+[packages/quickjs-emscripten-core/src/context.ts:940](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L940)
 
 ***
 
@@ -1410,7 +1539,7 @@ See [Equality comparisons and sameness](https://developer.mozilla.org/en-US/docs
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:827](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L827)
+[packages/quickjs-emscripten-core/src/context.ts:948](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L948)
 
 ***
 
@@ -1447,7 +1576,7 @@ properties.
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:985](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L985)
+[packages/quickjs-emscripten-core/src/context.ts:1106](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L1106)
 
 ***
 
@@ -1469,7 +1598,7 @@ properties.
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:1436](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L1436)
+[packages/quickjs-emscripten-core/src/context.ts:1535](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L1535)
 
 ***
 
@@ -1489,7 +1618,33 @@ Throw an error in the VM, interrupted whatever current execution is in progress
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:1193](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L1193)
+[packages/quickjs-emscripten-core/src/context.ts:1314](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L1314)
+
+***
+
+### toHostRef()
+
+> **toHostRef**\<`T`\>(`handle`): `undefined` \| `HostRef`\<`T`\>
+
+If `handle` is a `HostRef<T>.handle`, return a new `HostRef<T>` instance wrapping the handle.
+
+You must call [HostRef#dispose]([object Object]) or otherwise consume the [HostRef#handle]([object Object]) to ensure the handle is not leaked.
+
+#### Type parameters
+
+• **T** extends `object`
+
+#### Parameters
+
+• **handle**: [`QuickJSHandle`](../exports.md#quickjshandle)
+
+#### Returns
+
+`undefined` \| `HostRef`\<`T`\>
+
+#### Source
+
+[packages/quickjs-emscripten-core/src/context.ts:732](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L732)
 
 ***
 
@@ -1517,7 +1672,35 @@ Does not support BigInt values correctly.
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:643](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L643)
+[packages/quickjs-emscripten-core/src/context.ts:764](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L764)
+
+***
+
+### unwrapHostRef()
+
+> **unwrapHostRef**\<`T`\>(`handle`): `T`
+
+If `handle` is a `HostRef<T>.handle`, return the host value `T`.
+
+#### Type parameters
+
+• **T** extends `object`
+
+#### Parameters
+
+• **handle**: [`QuickJSHandle`](../exports.md#quickjshandle)
+
+#### Returns
+
+`T`
+
+#### Throws
+
+QuickJSHostRefInvalid if `handle` is not a `HostRef<T>.handle`
+
+#### Source
+
+[packages/quickjs-emscripten-core/src/context.ts:747](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L747)
 
 ***
 
@@ -1544,7 +1727,7 @@ If the result is an error, converts the error to a native object and throws the
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:1277](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L1277)
+[packages/quickjs-emscripten-core/src/context.ts:1398](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L1398)
 
 ***
 
diff --git a/doc/quickjs-emscripten/classes/QuickJSRuntime.md b/doc/quickjs-emscripten/classes/QuickJSRuntime.md
index a6c48a828..7c9199406 100644
--- a/doc/quickjs-emscripten/classes/QuickJSRuntime.md
+++ b/doc/quickjs-emscripten/classes/QuickJSRuntime.md
@@ -79,7 +79,7 @@ A context here may be allocated if one is needed by the runtime, eg for [compute
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/runtime.ts:78](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/runtime.ts#L78)
+[packages/quickjs-emscripten-core/src/runtime.ts:79](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/runtime.ts#L79)
 
 ## Accessors
 
@@ -97,7 +97,7 @@ false after the object has been [dispose](QuickJSRuntime.md#dispose-1)d
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/runtime.ts:125](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/runtime.ts#L125)
+[packages/quickjs-emscripten-core/src/runtime.ts:128](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/runtime.ts#L128)
 
 ## Methods
 
@@ -145,7 +145,7 @@ QuickJSWrongOwner if owned by a different runtime.
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/runtime.ts:327](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/runtime.ts#L327)
+[packages/quickjs-emscripten-core/src/runtime.ts:330](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/runtime.ts#L330)
 
 ***
 
@@ -165,7 +165,7 @@ For a human-digestible representation, see [dumpMemoryUsage](QuickJSRuntime.md#d
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/runtime.ts:296](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/runtime.ts#L296)
+[packages/quickjs-emscripten-core/src/runtime.ts:299](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/runtime.ts#L299)
 
 ***
 
@@ -188,7 +188,7 @@ manipulation if debug logging is disabled.
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/runtime.ts:363](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/runtime.ts#L363)
+[packages/quickjs-emscripten-core/src/runtime.ts:366](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/runtime.ts#L366)
 
 ***
 
@@ -212,7 +212,7 @@ Dispose of the underlying resources used by this object.
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/runtime.ts:129](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/runtime.ts#L129)
+[packages/quickjs-emscripten-core/src/runtime.ts:132](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/runtime.ts#L132)
 
 ***
 
@@ -229,7 +229,7 @@ For programmatic access to this information, see [computeMemoryUsage](QuickJSRun
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/runtime.ts:307](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/runtime.ts#L307)
+[packages/quickjs-emscripten-core/src/runtime.ts:310](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/runtime.ts#L310)
 
 ***
 
@@ -263,7 +263,7 @@ functions or rejected promises. Those errors are available by calling
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/runtime.ts:243](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/runtime.ts#L243)
+[packages/quickjs-emscripten-core/src/runtime.ts:246](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/runtime.ts#L246)
 
 ***
 
@@ -282,7 +282,7 @@ true if there is at least one pendingJob queued up.
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/runtime.ts:194](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/runtime.ts#L194)
+[packages/quickjs-emscripten-core/src/runtime.ts:197](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/runtime.ts#L197)
 
 ***
 
@@ -298,7 +298,7 @@ true if debug logging is enabled
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/runtime.ts:353](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/runtime.ts#L353)
+[packages/quickjs-emscripten-core/src/runtime.ts:356](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/runtime.ts#L356)
 
 ***
 
@@ -322,7 +322,7 @@ You should dispose a created context before disposing this runtime.
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/runtime.ts:140](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/runtime.ts#L140)
+[packages/quickjs-emscripten-core/src/runtime.ts:143](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/runtime.ts#L143)
 
 ***
 
@@ -339,7 +339,7 @@ See [setInterruptHandler](QuickJSRuntime.md#setinterrupthandler).
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/runtime.ts:219](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/runtime.ts#L219)
+[packages/quickjs-emscripten-core/src/runtime.ts:222](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/runtime.ts#L222)
 
 ***
 
@@ -355,7 +355,7 @@ Remove the the loader set by [setModuleLoader](QuickJSRuntime.md#setmoduleloader
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/runtime.ts:181](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/runtime.ts#L181)
+[packages/quickjs-emscripten-core/src/runtime.ts:184](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/runtime.ts#L184)
 
 ***
 
@@ -378,7 +378,7 @@ code.
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/runtime.ts:343](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/runtime.ts#L343)
+[packages/quickjs-emscripten-core/src/runtime.ts:346](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/runtime.ts#L346)
 
 ***
 
@@ -402,7 +402,7 @@ The interrupt handler can be removed with [removeInterruptHandler](QuickJSRuntim
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/runtime.ts:207](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/runtime.ts#L207)
+[packages/quickjs-emscripten-core/src/runtime.ts:210](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/runtime.ts#L210)
 
 ***
 
@@ -423,7 +423,7 @@ To remove the limit, set to `0`.
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/runtime.ts:315](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/runtime.ts#L315)
+[packages/quickjs-emscripten-core/src/runtime.ts:318](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/runtime.ts#L318)
 
 ***
 
@@ -444,7 +444,7 @@ To remove the limit, set to `-1`.
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/runtime.ts:281](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/runtime.ts#L281)
+[packages/quickjs-emscripten-core/src/runtime.ts:284](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/runtime.ts#L284)
 
 ***
 
@@ -469,7 +469,7 @@ The loader can be removed with [removeModuleLoader](QuickJSRuntime.md#removemodu
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/runtime.ts:172](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/runtime.ts#L172)
+[packages/quickjs-emscripten-core/src/runtime.ts:175](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/runtime.ts#L175)
 
 ***
 
diff --git a/doc/quickjs-emscripten/classes/QuickJSWASMModule.md b/doc/quickjs-emscripten/classes/QuickJSWASMModule.md
index 160016779..8e49ce59d 100644
--- a/doc/quickjs-emscripten/classes/QuickJSWASMModule.md
+++ b/doc/quickjs-emscripten/classes/QuickJSWASMModule.md
@@ -81,7 +81,7 @@ with name `"InternalError"` and  message `"interrupted"`.
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/module.ts:395](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/module.ts#L395)
+[packages/quickjs-emscripten-core/src/module.ts:410](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/module.ts#L410)
 
 ***
 
@@ -101,7 +101,7 @@ and provide the [CustomizeVariantOptions#wasmMemory](../interfaces/CustomizeVari
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/module.ts:426](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/module.ts#L426)
+[packages/quickjs-emscripten-core/src/module.ts:441](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/module.ts#L441)
 
 ***
 
@@ -123,7 +123,7 @@ be disposed when the context is disposed.
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/module.ts:360](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/module.ts#L360)
+[packages/quickjs-emscripten-core/src/module.ts:375](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/module.ts#L375)
 
 ***
 
@@ -145,7 +145,7 @@ loading for one or more [QuickJSContext](QuickJSContext.md)s inside the runtime.
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/module.ts:333](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/module.ts#L333)
+[packages/quickjs-emscripten-core/src/module.ts:346](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/module.ts#L346)
 
 ***
 
diff --git a/doc/quickjs-emscripten/classes/StaticLifetime.md b/doc/quickjs-emscripten/classes/StaticLifetime.md
index d8ce4a699..32d30ca3b 100644
--- a/doc/quickjs-emscripten/classes/StaticLifetime.md
+++ b/doc/quickjs-emscripten/classes/StaticLifetime.md
@@ -28,6 +28,7 @@ A Lifetime that lives forever. Used for constants.
   - [value](StaticLifetime.md#value)
 - [Methods](StaticLifetime.md#methods)
   - [`[dispose]`()](StaticLifetime.md#dispose)
+  - [assertAlive()](StaticLifetime.md#assertalive)
   - [consume()](StaticLifetime.md#consume)
   - [dispose()](StaticLifetime.md#dispose)
   - [dup()](StaticLifetime.md#dup)
@@ -257,6 +258,24 @@ Just calls the standard .dispose() method of this class.
 
 ***
 
+### assertAlive()
+
+> **`protected`** **assertAlive**(): `void`
+
+#### Returns
+
+`void`
+
+#### Inherited from
+
+[`quickjs-emscripten.Lifetime.assertAlive`](Lifetime.md#assertalive)
+
+#### Source
+
+[packages/quickjs-emscripten-core/src/lifetime.ts:182](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/lifetime.ts#L182)
+
+***
+
 ### consume()
 
 #### consume(map)
diff --git a/doc/quickjs-emscripten/classes/WeakLifetime.md b/doc/quickjs-emscripten/classes/WeakLifetime.md
index eedbf4cd7..8190471f2 100644
--- a/doc/quickjs-emscripten/classes/WeakLifetime.md
+++ b/doc/quickjs-emscripten/classes/WeakLifetime.md
@@ -32,6 +32,7 @@ Used for function arguments.
   - [value](WeakLifetime.md#value)
 - [Methods](WeakLifetime.md#methods)
   - [`[dispose]`()](WeakLifetime.md#dispose)
+  - [assertAlive()](WeakLifetime.md#assertalive)
   - [consume()](WeakLifetime.md#consume)
   - [dispose()](WeakLifetime.md#dispose)
   - [dup()](WeakLifetime.md#dup)
@@ -267,6 +268,24 @@ Just calls the standard .dispose() method of this class.
 
 ***
 
+### assertAlive()
+
+> **`protected`** **assertAlive**(): `void`
+
+#### Returns
+
+`void`
+
+#### Inherited from
+
+[`quickjs-emscripten.Lifetime.assertAlive`](Lifetime.md#assertalive)
+
+#### Source
+
+[packages/quickjs-emscripten-core/src/lifetime.ts:182](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/lifetime.ts#L182)
+
+***
+
 ### consume()
 
 #### consume(map)
diff --git a/doc/quickjs-emscripten/exports.md b/doc/quickjs-emscripten/exports.md
index f1158d416..c43ec1b96 100644
--- a/doc/quickjs-emscripten/exports.md
+++ b/doc/quickjs-emscripten/exports.md
@@ -219,7 +219,7 @@ An `Array` that also implements [Disposable](interfaces/Disposable.md):
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:538
+packages/quickjs-ffi-types/dist/index.d.ts:547
 
 ***
 
@@ -229,7 +229,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:538
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:332
+packages/quickjs-ffi-types/dist/index.d.ts:337
 
 ***
 
@@ -245,7 +245,7 @@ by the runtime.
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/runtime.ts:35](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/runtime.ts#L35)
+[packages/quickjs-emscripten-core/src/runtime.ts:36](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/runtime.ts#L36)
 
 ***
 
@@ -270,7 +270,7 @@ Determines if a VM's execution should be interrupted.
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/runtime.ts:27](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/runtime.ts#L27)
+[packages/quickjs-emscripten-core/src/runtime.ts:28](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/runtime.ts#L28)
 
 ***
 
@@ -486,7 +486,7 @@ State of a promise.
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:145
+packages/quickjs-ffi-types/dist/index.d.ts:149
 
 ***
 
@@ -747,7 +747,7 @@ Property key for getting or setting a property on a handle with
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/context.ts:68](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L68)
+[packages/quickjs-emscripten-core/src/context.ts:71](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/context.ts#L71)
 
 ***
 
@@ -757,7 +757,7 @@ Property key for getting or setting a property on a handle with
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:537
+packages/quickjs-ffi-types/dist/index.d.ts:546
 
 ***
 
@@ -1033,7 +1033,7 @@ module code
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:94
+packages/quickjs-ffi-types/dist/index.d.ts:98
 
 ***
 
@@ -1075,7 +1075,7 @@ Bitfield options for QTS_GetOwnPropertyNames
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:154
+packages/quickjs-ffi-types/dist/index.d.ts:158
 
 ***
 
@@ -1153,7 +1153,7 @@ Bitfield options for QTS_NewContext intrinsics
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:122
+packages/quickjs-ffi-types/dist/index.d.ts:126
 
 ***
 
@@ -1177,7 +1177,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:122
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:168
+packages/quickjs-ffi-types/dist/index.d.ts:172
 
 ***
 
@@ -1201,7 +1201,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:168
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:145
+packages/quickjs-ffi-types/dist/index.d.ts:149
 
 ***
 
@@ -1280,7 +1280,7 @@ packages/variant-quickjs-wasmfile-release-sync/dist/index.d.ts:18
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:90
+packages/quickjs-ffi-types/dist/index.d.ts:94
 
 ***
 
diff --git a/doc/quickjs-emscripten/interfaces/EmscriptenModule.md b/doc/quickjs-emscripten/interfaces/EmscriptenModule.md
index 3ae98434e..2fb8fba3d 100644
--- a/doc/quickjs-emscripten/interfaces/EmscriptenModule.md
+++ b/doc/quickjs-emscripten/interfaces/EmscriptenModule.md
@@ -49,7 +49,7 @@ QuickJS.
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:289
+packages/quickjs-ffi-types/dist/index.d.ts:293
 
 ***
 
@@ -59,7 +59,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:289
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:280
+packages/quickjs-ffi-types/dist/index.d.ts:284
 
 ***
 
@@ -69,7 +69,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:280
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:281
+packages/quickjs-ffi-types/dist/index.d.ts:285
 
 ***
 
@@ -79,7 +79,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:281
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:279
+packages/quickjs-ffi-types/dist/index.d.ts:283
 
 ***
 
@@ -89,7 +89,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:279
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:285
+packages/quickjs-ffi-types/dist/index.d.ts:289
 
 ***
 
@@ -99,7 +99,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:285
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:286
+packages/quickjs-ffi-types/dist/index.d.ts:290
 
 ***
 
@@ -109,7 +109,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:286
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:283
+packages/quickjs-ffi-types/dist/index.d.ts:287
 
 ***
 
@@ -119,7 +119,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:283
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:284
+packages/quickjs-ffi-types/dist/index.d.ts:288
 
 ***
 
@@ -129,7 +129,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:284
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:282
+packages/quickjs-ffi-types/dist/index.d.ts:286
 
 ***
 
@@ -139,7 +139,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:282
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:288
+packages/quickjs-ffi-types/dist/index.d.ts:292
 
 ***
 
@@ -149,7 +149,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:288
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:287
+packages/quickjs-ffi-types/dist/index.d.ts:291
 
 ***
 
@@ -165,7 +165,7 @@ Compile this to WebAssembly.Module
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:246
+packages/quickjs-ffi-types/dist/index.d.ts:250
 
 ***
 
@@ -181,7 +181,7 @@ If provided, use this WebAssembly.Memory instead of an automatically created one
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:248
+packages/quickjs-ffi-types/dist/index.d.ts:252
 
 ## Methods
 
@@ -204,7 +204,7 @@ https://emscripten.org/docs/api_reference/preamble.js.html#UTF8ToString
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:274
+packages/quickjs-ffi-types/dist/index.d.ts:278
 
 ***
 
@@ -222,7 +222,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:274
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:277
+packages/quickjs-ffi-types/dist/index.d.ts:281
 
 ***
 
@@ -240,7 +240,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:277
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:276
+packages/quickjs-ffi-types/dist/index.d.ts:280
 
 ***
 
@@ -273,7 +273,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:276
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:278
+packages/quickjs-ffi-types/dist/index.d.ts:282
 
 ***
 
@@ -299,7 +299,7 @@ Create an instance of the WASM module, call onSuccess(instance), then return ins
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:250
+packages/quickjs-ffi-types/dist/index.d.ts:254
 
 ***
 
@@ -317,7 +317,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:250
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:275
+packages/quickjs-ffi-types/dist/index.d.ts:279
 
 ***
 
@@ -361,7 +361,7 @@ Often `''` (empty string)
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:242
+packages/quickjs-ffi-types/dist/index.d.ts:246
 
 ***
 
@@ -385,7 +385,7 @@ Called by emscripten as dependencies blocking initialization are added or fulfil
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:252
+packages/quickjs-ffi-types/dist/index.d.ts:256
 
 ***
 
@@ -410,7 +410,7 @@ https://emscripten.org/docs/api_reference/preamble.js.html#stringToUTF8
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:269
+packages/quickjs-ffi-types/dist/index.d.ts:273
 
 ***
 
diff --git a/doc/quickjs-emscripten/interfaces/EmscriptenModuleLoader.md b/doc/quickjs-emscripten/interfaces/EmscriptenModuleLoader.md
index 5a7ed44d7..2e09fe34c 100644
--- a/doc/quickjs-emscripten/interfaces/EmscriptenModuleLoader.md
+++ b/doc/quickjs-emscripten/interfaces/EmscriptenModuleLoader.md
@@ -22,7 +22,7 @@
 
 ## Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:334
+packages/quickjs-ffi-types/dist/index.d.ts:339
 
 ***
 
diff --git a/doc/quickjs-emscripten/interfaces/EmscriptenModuleLoaderOptions.md b/doc/quickjs-emscripten/interfaces/EmscriptenModuleLoaderOptions.md
index a13ee856e..d87ea2daa 100644
--- a/doc/quickjs-emscripten/interfaces/EmscriptenModuleLoaderOptions.md
+++ b/doc/quickjs-emscripten/interfaces/EmscriptenModuleLoaderOptions.md
@@ -35,7 +35,7 @@ Compile this to WebAssembly.Module
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:246
+packages/quickjs-ffi-types/dist/index.d.ts:250
 
 ***
 
@@ -47,7 +47,7 @@ If provided, use this WebAssembly.Memory instead of an automatically created one
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:248
+packages/quickjs-ffi-types/dist/index.d.ts:252
 
 ## Methods
 
@@ -69,7 +69,7 @@ Create an instance of the WASM module, call onSuccess(instance), then return ins
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:250
+packages/quickjs-ffi-types/dist/index.d.ts:254
 
 ***
 
@@ -109,7 +109,7 @@ Often `''` (empty string)
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:242
+packages/quickjs-ffi-types/dist/index.d.ts:246
 
 ***
 
@@ -129,7 +129,7 @@ Called by emscripten as dependencies blocking initialization are added or fulfil
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:252
+packages/quickjs-ffi-types/dist/index.d.ts:256
 
 ***
 
diff --git a/doc/quickjs-emscripten/interfaces/ModuleEvalOptions.md b/doc/quickjs-emscripten/interfaces/ModuleEvalOptions.md
index ad467e4ff..463554f6c 100644
--- a/doc/quickjs-emscripten/interfaces/ModuleEvalOptions.md
+++ b/doc/quickjs-emscripten/interfaces/ModuleEvalOptions.md
@@ -27,7 +27,7 @@ To remove the limit, set to `0`.
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/module.ts:82](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/module.ts#L82)
+[packages/quickjs-emscripten-core/src/module.ts:85](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/module.ts#L85)
 
 ***
 
@@ -39,7 +39,7 @@ Memory limit, in bytes, of WebAssembly heap memory used by the QuickJS VM.
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/module.ts:76](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/module.ts#L76)
+[packages/quickjs-emscripten-core/src/module.ts:79](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/module.ts#L79)
 
 ***
 
@@ -51,7 +51,7 @@ Module loader for any `import` statements or expressions.
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/module.ts:87](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/module.ts#L87)
+[packages/quickjs-emscripten-core/src/module.ts:90](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/module.ts#L90)
 
 ***
 
@@ -64,7 +64,7 @@ See [shouldInterruptAfterDeadline](../exports.md#shouldinterruptafterdeadline).
 
 #### Source
 
-[packages/quickjs-emscripten-core/src/module.ts:71](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/module.ts#L71)
+[packages/quickjs-emscripten-core/src/module.ts:74](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/module.ts#L74)
 
 ***
 
diff --git a/doc/quickjs-emscripten/interfaces/QuickJSAsyncEmscriptenModule.md b/doc/quickjs-emscripten/interfaces/QuickJSAsyncEmscriptenModule.md
index 3818ee385..9ef15e012 100644
--- a/doc/quickjs-emscripten/interfaces/QuickJSAsyncEmscriptenModule.md
+++ b/doc/quickjs-emscripten/interfaces/QuickJSAsyncEmscriptenModule.md
@@ -55,7 +55,7 @@ QuickJS.
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:289
+packages/quickjs-ffi-types/dist/index.d.ts:293
 
 ***
 
@@ -69,7 +69,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:289
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:280
+packages/quickjs-ffi-types/dist/index.d.ts:284
 
 ***
 
@@ -83,7 +83,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:280
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:281
+packages/quickjs-ffi-types/dist/index.d.ts:285
 
 ***
 
@@ -97,7 +97,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:281
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:279
+packages/quickjs-ffi-types/dist/index.d.ts:283
 
 ***
 
@@ -111,7 +111,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:279
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:285
+packages/quickjs-ffi-types/dist/index.d.ts:289
 
 ***
 
@@ -125,7 +125,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:285
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:286
+packages/quickjs-ffi-types/dist/index.d.ts:290
 
 ***
 
@@ -139,7 +139,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:286
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:283
+packages/quickjs-ffi-types/dist/index.d.ts:287
 
 ***
 
@@ -153,7 +153,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:283
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:284
+packages/quickjs-ffi-types/dist/index.d.ts:288
 
 ***
 
@@ -167,7 +167,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:284
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:282
+packages/quickjs-ffi-types/dist/index.d.ts:286
 
 ***
 
@@ -181,7 +181,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:282
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:288
+packages/quickjs-ffi-types/dist/index.d.ts:292
 
 ***
 
@@ -195,7 +195,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:288
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:287
+packages/quickjs-ffi-types/dist/index.d.ts:291
 
 ***
 
@@ -205,7 +205,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:287
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:330
+packages/quickjs-ffi-types/dist/index.d.ts:335
 
 ***
 
@@ -219,7 +219,7 @@ Implement this field
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:329
+packages/quickjs-ffi-types/dist/index.d.ts:334
 
 ***
 
@@ -235,7 +235,7 @@ Compile this to WebAssembly.Module
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:246
+packages/quickjs-ffi-types/dist/index.d.ts:250
 
 ***
 
@@ -251,7 +251,7 @@ If provided, use this WebAssembly.Memory instead of an automatically created one
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:248
+packages/quickjs-ffi-types/dist/index.d.ts:252
 
 ## Methods
 
@@ -278,7 +278,7 @@ https://emscripten.org/docs/api_reference/preamble.js.html#UTF8ToString
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:274
+packages/quickjs-ffi-types/dist/index.d.ts:278
 
 ***
 
@@ -300,7 +300,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:274
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:277
+packages/quickjs-ffi-types/dist/index.d.ts:281
 
 ***
 
@@ -322,7 +322,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:277
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:276
+packages/quickjs-ffi-types/dist/index.d.ts:280
 
 ***
 
@@ -359,7 +359,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:276
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:278
+packages/quickjs-ffi-types/dist/index.d.ts:282
 
 ***
 
@@ -385,7 +385,7 @@ Create an instance of the WASM module, call onSuccess(instance), then return ins
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:250
+packages/quickjs-ffi-types/dist/index.d.ts:254
 
 ***
 
@@ -407,7 +407,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:250
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:275
+packages/quickjs-ffi-types/dist/index.d.ts:279
 
 ***
 
@@ -451,7 +451,7 @@ Often `''` (empty string)
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:242
+packages/quickjs-ffi-types/dist/index.d.ts:246
 
 ***
 
@@ -475,7 +475,7 @@ Called by emscripten as dependencies blocking initialization are added or fulfil
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:252
+packages/quickjs-ffi-types/dist/index.d.ts:256
 
 ***
 
@@ -504,7 +504,7 @@ https://emscripten.org/docs/api_reference/preamble.js.html#stringToUTF8
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:269
+packages/quickjs-ffi-types/dist/index.d.ts:273
 
 ***
 
diff --git a/doc/quickjs-emscripten/interfaces/QuickJSAsyncFFI.md b/doc/quickjs-emscripten/interfaces/QuickJSAsyncFFI.md
index 0d45618c4..6ddff62b8 100644
--- a/doc/quickjs-emscripten/interfaces/QuickJSAsyncFFI.md
+++ b/doc/quickjs-emscripten/interfaces/QuickJSAsyncFFI.md
@@ -41,6 +41,7 @@ library.
   - [QTS\_GetFalse](QuickJSAsyncFFI.md#qts-getfalse)
   - [QTS\_GetFloat64](QuickJSAsyncFFI.md#qts-getfloat64)
   - [QTS\_GetGlobalObject](QuickJSAsyncFFI.md#qts-getglobalobject)
+  - [QTS\_GetHostRefId](QuickJSAsyncFFI.md#qts-gethostrefid)
   - [QTS\_GetLength](QuickJSAsyncFFI.md#qts-getlength)
   - [QTS\_GetModuleNamespace](QuickJSAsyncFFI.md#qts-getmodulenamespace)
   - [QTS\_GetNull](QuickJSAsyncFFI.md#qts-getnull)
@@ -64,6 +65,7 @@ library.
   - [QTS\_NewError](QuickJSAsyncFFI.md#qts-newerror)
   - [QTS\_NewFloat64](QuickJSAsyncFFI.md#qts-newfloat64)
   - [QTS\_NewFunction](QuickJSAsyncFFI.md#qts-newfunction)
+  - [QTS\_NewHostRef](QuickJSAsyncFFI.md#qts-newhostref)
   - [QTS\_NewObject](QuickJSAsyncFFI.md#qts-newobject)
   - [QTS\_NewObjectProto](QuickJSAsyncFFI.md#qts-newobjectproto)
   - [QTS\_NewPromiseCapability](QuickJSAsyncFFI.md#qts-newpromisecapability)
@@ -105,7 +107,7 @@ Set at compile time.
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:424
+packages/quickjs-ffi-types/dist/index.d.ts:431
 
 ***
 
@@ -125,7 +127,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:424
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:493
+packages/quickjs-ffi-types/dist/index.d.ts:502
 
 ***
 
@@ -139,7 +141,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:493
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:491
+packages/quickjs-ffi-types/dist/index.d.ts:500
 
 ***
 
@@ -153,7 +155,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:491
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:490
+packages/quickjs-ffi-types/dist/index.d.ts:499
 
 ***
 
@@ -167,7 +169,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:490
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:431
+packages/quickjs-ffi-types/dist/index.d.ts:438
 
 ***
 
@@ -193,7 +195,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:431
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:472
+packages/quickjs-ffi-types/dist/index.d.ts:481
 
 ***
 
@@ -219,7 +221,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:472
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:473
+packages/quickjs-ffi-types/dist/index.d.ts:482
 
 ***
 
@@ -253,7 +255,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:473
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:469
+packages/quickjs-ffi-types/dist/index.d.ts:478
 
 ***
 
@@ -273,7 +275,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:469
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:475
+packages/quickjs-ffi-types/dist/index.d.ts:484
 
 ***
 
@@ -293,7 +295,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:475
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:476
+packages/quickjs-ffi-types/dist/index.d.ts:485
 
 ***
 
@@ -313,7 +315,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:476
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:445
+packages/quickjs-ffi-types/dist/index.d.ts:454
 
 ***
 
@@ -341,7 +343,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:445
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:477
+packages/quickjs-ffi-types/dist/index.d.ts:486
 
 ***
 
@@ -369,7 +371,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:477
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:478
+packages/quickjs-ffi-types/dist/index.d.ts:487
 
 ***
 
@@ -391,7 +393,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:478
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:461
+packages/quickjs-ffi-types/dist/index.d.ts:470
 
 ***
 
@@ -413,7 +415,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:461
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:462
+packages/quickjs-ffi-types/dist/index.d.ts:471
 
 ***
 
@@ -433,7 +435,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:462
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:444
+packages/quickjs-ffi-types/dist/index.d.ts:453
 
 ***
 
@@ -451,7 +453,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:444
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:440
+packages/quickjs-ffi-types/dist/index.d.ts:449
 
 ***
 
@@ -469,7 +471,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:440
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:438
+packages/quickjs-ffi-types/dist/index.d.ts:447
 
 ***
 
@@ -489,7 +491,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:438
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:441
+packages/quickjs-ffi-types/dist/index.d.ts:450
 
 ***
 
@@ -509,7 +511,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:441
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:442
+packages/quickjs-ffi-types/dist/index.d.ts:451
 
 ***
 
@@ -529,7 +531,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:442
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:443
+packages/quickjs-ffi-types/dist/index.d.ts:452
 
 ***
 
@@ -549,7 +551,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:443
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:454
+packages/quickjs-ffi-types/dist/index.d.ts:463
 
 ***
 
@@ -569,7 +571,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:454
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:455
+packages/quickjs-ffi-types/dist/index.d.ts:464
 
 ***
 
@@ -587,7 +589,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:455
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:488
+packages/quickjs-ffi-types/dist/index.d.ts:497
 
 ***
 
@@ -601,7 +603,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:488
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:435
+packages/quickjs-ffi-types/dist/index.d.ts:442
 
 ***
 
@@ -621,7 +623,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:435
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:451
+packages/quickjs-ffi-types/dist/index.d.ts:460
 
 ***
 
@@ -639,7 +641,25 @@ packages/quickjs-ffi-types/dist/index.d.ts:451
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:483
+packages/quickjs-ffi-types/dist/index.d.ts:492
+
+***
+
+### QTS\_GetHostRefId
+
+> **QTS\_GetHostRefId**: (`value`) => `HostRefId`
+
+#### Parameters
+
+• **value**: [`JSValueConstPointer`](../exports.md#jsvalueconstpointer) \| [`JSValuePointer`](../exports.md#jsvaluepointer)
+
+#### Returns
+
+`HostRefId`
+
+#### Source
+
+packages/quickjs-ffi-types/dist/index.d.ts:445
 
 ***
 
@@ -661,7 +681,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:483
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:481
+packages/quickjs-ffi-types/dist/index.d.ts:490
 
 ***
 
@@ -681,7 +701,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:481
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:479
+packages/quickjs-ffi-types/dist/index.d.ts:488
 
 ***
 
@@ -695,7 +715,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:479
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:434
+packages/quickjs-ffi-types/dist/index.d.ts:441
 
 ***
 
@@ -721,7 +741,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:434
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:470
+packages/quickjs-ffi-types/dist/index.d.ts:479
 
 ***
 
@@ -747,7 +767,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:470
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:471
+packages/quickjs-ffi-types/dist/index.d.ts:480
 
 ***
 
@@ -769,7 +789,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:471
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:463
+packages/quickjs-ffi-types/dist/index.d.ts:472
 
 ***
 
@@ -791,7 +811,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:463
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:465
+packages/quickjs-ffi-types/dist/index.d.ts:474
 
 ***
 
@@ -813,7 +833,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:465
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:466
+packages/quickjs-ffi-types/dist/index.d.ts:475
 
 ***
 
@@ -835,7 +855,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:466
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:464
+packages/quickjs-ffi-types/dist/index.d.ts:473
 
 ***
 
@@ -855,7 +875,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:464
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:453
+packages/quickjs-ffi-types/dist/index.d.ts:462
 
 ***
 
@@ -875,7 +895,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:453
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:457
+packages/quickjs-ffi-types/dist/index.d.ts:466
 
 ***
 
@@ -895,7 +915,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:457
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:458
+packages/quickjs-ffi-types/dist/index.d.ts:467
 
 ***
 
@@ -909,7 +929,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:458
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:436
+packages/quickjs-ffi-types/dist/index.d.ts:443
 
 ***
 
@@ -923,7 +943,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:436
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:433
+packages/quickjs-ffi-types/dist/index.d.ts:440
 
 ***
 
@@ -947,7 +967,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:433
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:482
+packages/quickjs-ffi-types/dist/index.d.ts:491
 
 ***
 
@@ -967,7 +987,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:482
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:459
+packages/quickjs-ffi-types/dist/index.d.ts:468
 
 ***
 
@@ -985,7 +1005,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:459
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:460
+packages/quickjs-ffi-types/dist/index.d.ts:469
 
 ***
 
@@ -1003,7 +1023,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:460
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:448
+packages/quickjs-ffi-types/dist/index.d.ts:457
 
 ***
 
@@ -1025,7 +1045,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:448
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:449
+packages/quickjs-ffi-types/dist/index.d.ts:458
 
 ***
 
@@ -1045,7 +1065,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:449
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:439
+packages/quickjs-ffi-types/dist/index.d.ts:448
 
 ***
 
@@ -1063,7 +1083,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:439
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:426
+packages/quickjs-ffi-types/dist/index.d.ts:433
 
 ***
 
@@ -1083,29 +1103,53 @@ packages/quickjs-ffi-types/dist/index.d.ts:426
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:450
+packages/quickjs-ffi-types/dist/index.d.ts:459
 
 ***
 
 ### QTS\_NewFunction
 
-> **QTS\_NewFunction**: (`ctx`, `func_id`, `name`) => [`JSValuePointer`](../exports.md#jsvaluepointer)
+> **QTS\_NewFunction**: (`ctx`, `name`, `arg_length`, `is_constructor`, `host_ref_id`) => [`JSValuePointer`](../exports.md#jsvaluepointer)
 
 #### Parameters
 
 • **ctx**: [`JSContextPointer`](../exports.md#jscontextpointer)
 
-• **func\_id**: `number`
-
 • **name**: `string`
 
+• **arg\_length**: `number`
+
+• **is\_constructor**: `boolean`
+
+• **host\_ref\_id**: `HostRefId`
+
 #### Returns
 
 [`JSValuePointer`](../exports.md#jsvaluepointer)
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:492
+packages/quickjs-ffi-types/dist/index.d.ts:501
+
+***
+
+### QTS\_NewHostRef
+
+> **QTS\_NewHostRef**: (`ctx`, `id`) => [`JSValuePointer`](../exports.md#jsvaluepointer)
+
+#### Parameters
+
+• **ctx**: [`JSContextPointer`](../exports.md#jscontextpointer)
+
+• **id**: `HostRefId`
+
+#### Returns
+
+[`JSValuePointer`](../exports.md#jsvaluepointer)
+
+#### Source
+
+packages/quickjs-ffi-types/dist/index.d.ts:444
 
 ***
 
@@ -1123,7 +1167,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:492
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:446
+packages/quickjs-ffi-types/dist/index.d.ts:455
 
 ***
 
@@ -1143,7 +1187,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:446
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:447
+packages/quickjs-ffi-types/dist/index.d.ts:456
 
 ***
 
@@ -1163,7 +1207,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:447
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:484
+packages/quickjs-ffi-types/dist/index.d.ts:493
 
 ***
 
@@ -1177,7 +1221,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:484
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:437
+packages/quickjs-ffi-types/dist/index.d.ts:446
 
 ***
 
@@ -1197,7 +1241,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:437
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:452
+packages/quickjs-ffi-types/dist/index.d.ts:461
 
 ***
 
@@ -1219,7 +1263,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:452
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:456
+packages/quickjs-ffi-types/dist/index.d.ts:465
 
 ***
 
@@ -1239,7 +1283,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:456
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:486
+packages/quickjs-ffi-types/dist/index.d.ts:495
 
 ***
 
@@ -1259,7 +1303,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:486
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:485
+packages/quickjs-ffi-types/dist/index.d.ts:494
 
 ***
 
@@ -1273,7 +1317,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:485
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:430
+packages/quickjs-ffi-types/dist/index.d.ts:437
 
 ***
 
@@ -1293,7 +1337,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:430
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:474
+packages/quickjs-ffi-types/dist/index.d.ts:483
 
 ***
 
@@ -1313,7 +1357,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:474
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:428
+packages/quickjs-ffi-types/dist/index.d.ts:435
 
 ***
 
@@ -1331,7 +1375,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:428
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:495
+packages/quickjs-ffi-types/dist/index.d.ts:504
 
 ***
 
@@ -1349,7 +1393,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:495
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:497
+packages/quickjs-ffi-types/dist/index.d.ts:506
 
 ***
 
@@ -1367,7 +1411,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:497
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:429
+packages/quickjs-ffi-types/dist/index.d.ts:436
 
 ***
 
@@ -1385,7 +1429,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:429
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:494
+packages/quickjs-ffi-types/dist/index.d.ts:503
 
 ***
 
@@ -1405,7 +1449,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:494
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:496
+packages/quickjs-ffi-types/dist/index.d.ts:505
 
 ***
 
@@ -1425,7 +1469,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:496
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:432
+packages/quickjs-ffi-types/dist/index.d.ts:439
 
 ***
 
@@ -1445,7 +1489,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:432
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:427
+packages/quickjs-ffi-types/dist/index.d.ts:434
 
 ***
 
@@ -1465,7 +1509,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:427
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:489
+packages/quickjs-ffi-types/dist/index.d.ts:498
 
 ***
 
@@ -1489,7 +1533,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:489
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:467
+packages/quickjs-ffi-types/dist/index.d.ts:476
 
 ***
 
@@ -1513,7 +1557,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:467
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:468
+packages/quickjs-ffi-types/dist/index.d.ts:477
 
 ***
 
@@ -1531,7 +1575,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:468
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:487
+packages/quickjs-ffi-types/dist/index.d.ts:496
 
 ***
 
@@ -1551,7 +1595,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:487
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:425
+packages/quickjs-ffi-types/dist/index.d.ts:432
 
 ***
 
@@ -1571,7 +1615,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:425
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:480
+packages/quickjs-ffi-types/dist/index.d.ts:489
 
 ***
 
@@ -1591,7 +1635,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:480
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:499
+packages/quickjs-ffi-types/dist/index.d.ts:508
 
 ***
 
@@ -1611,7 +1655,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:499
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:498
+packages/quickjs-ffi-types/dist/index.d.ts:507
 
 ***
 
diff --git a/doc/quickjs-emscripten/interfaces/QuickJSAsyncVariant.md b/doc/quickjs-emscripten/interfaces/QuickJSAsyncVariant.md
index 20da37113..8063569c8 100644
--- a/doc/quickjs-emscripten/interfaces/QuickJSAsyncVariant.md
+++ b/doc/quickjs-emscripten/interfaces/QuickJSAsyncVariant.md
@@ -36,7 +36,7 @@ build variant to [newQuickJSWASMModule](../exports.md#newquickjswasmmodule) or [
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:534
+packages/quickjs-ffi-types/dist/index.d.ts:543
 
 ***
 
@@ -50,7 +50,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:534
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:535
+packages/quickjs-ffi-types/dist/index.d.ts:544
 
 ***
 
@@ -60,7 +60,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:535
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:533
+packages/quickjs-ffi-types/dist/index.d.ts:542
 
 ***
 
diff --git a/doc/quickjs-emscripten/interfaces/QuickJSEmscriptenModule.md b/doc/quickjs-emscripten/interfaces/QuickJSEmscriptenModule.md
index 8220ecd3f..56dab5a93 100644
--- a/doc/quickjs-emscripten/interfaces/QuickJSEmscriptenModule.md
+++ b/doc/quickjs-emscripten/interfaces/QuickJSEmscriptenModule.md
@@ -55,7 +55,7 @@ QuickJS.
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:289
+packages/quickjs-ffi-types/dist/index.d.ts:293
 
 ***
 
@@ -69,7 +69,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:289
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:280
+packages/quickjs-ffi-types/dist/index.d.ts:284
 
 ***
 
@@ -83,7 +83,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:280
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:281
+packages/quickjs-ffi-types/dist/index.d.ts:285
 
 ***
 
@@ -97,7 +97,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:281
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:279
+packages/quickjs-ffi-types/dist/index.d.ts:283
 
 ***
 
@@ -111,7 +111,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:279
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:285
+packages/quickjs-ffi-types/dist/index.d.ts:289
 
 ***
 
@@ -125,7 +125,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:285
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:286
+packages/quickjs-ffi-types/dist/index.d.ts:290
 
 ***
 
@@ -139,7 +139,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:286
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:283
+packages/quickjs-ffi-types/dist/index.d.ts:287
 
 ***
 
@@ -153,7 +153,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:283
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:284
+packages/quickjs-ffi-types/dist/index.d.ts:288
 
 ***
 
@@ -167,7 +167,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:284
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:282
+packages/quickjs-ffi-types/dist/index.d.ts:286
 
 ***
 
@@ -181,7 +181,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:282
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:288
+packages/quickjs-ffi-types/dist/index.d.ts:292
 
 ***
 
@@ -195,7 +195,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:288
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:287
+packages/quickjs-ffi-types/dist/index.d.ts:291
 
 ***
 
@@ -205,7 +205,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:287
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:325
+packages/quickjs-ffi-types/dist/index.d.ts:330
 
 ***
 
@@ -215,7 +215,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:325
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:324
+packages/quickjs-ffi-types/dist/index.d.ts:329
 
 ***
 
@@ -231,7 +231,7 @@ Compile this to WebAssembly.Module
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:246
+packages/quickjs-ffi-types/dist/index.d.ts:250
 
 ***
 
@@ -247,7 +247,7 @@ If provided, use this WebAssembly.Memory instead of an automatically created one
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:248
+packages/quickjs-ffi-types/dist/index.d.ts:252
 
 ## Methods
 
@@ -274,7 +274,7 @@ https://emscripten.org/docs/api_reference/preamble.js.html#UTF8ToString
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:274
+packages/quickjs-ffi-types/dist/index.d.ts:278
 
 ***
 
@@ -296,7 +296,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:274
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:277
+packages/quickjs-ffi-types/dist/index.d.ts:281
 
 ***
 
@@ -318,7 +318,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:277
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:276
+packages/quickjs-ffi-types/dist/index.d.ts:280
 
 ***
 
@@ -355,7 +355,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:276
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:278
+packages/quickjs-ffi-types/dist/index.d.ts:282
 
 ***
 
@@ -381,7 +381,7 @@ Create an instance of the WASM module, call onSuccess(instance), then return ins
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:250
+packages/quickjs-ffi-types/dist/index.d.ts:254
 
 ***
 
@@ -403,7 +403,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:250
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:275
+packages/quickjs-ffi-types/dist/index.d.ts:279
 
 ***
 
@@ -447,7 +447,7 @@ Often `''` (empty string)
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:242
+packages/quickjs-ffi-types/dist/index.d.ts:246
 
 ***
 
@@ -471,7 +471,7 @@ Called by emscripten as dependencies blocking initialization are added or fulfil
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:252
+packages/quickjs-ffi-types/dist/index.d.ts:256
 
 ***
 
@@ -500,7 +500,7 @@ https://emscripten.org/docs/api_reference/preamble.js.html#stringToUTF8
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:269
+packages/quickjs-ffi-types/dist/index.d.ts:273
 
 ***
 
diff --git a/doc/quickjs-emscripten/interfaces/QuickJSFFI.md b/doc/quickjs-emscripten/interfaces/QuickJSFFI.md
index 0239d3df2..43fb7f948 100644
--- a/doc/quickjs-emscripten/interfaces/QuickJSFFI.md
+++ b/doc/quickjs-emscripten/interfaces/QuickJSFFI.md
@@ -37,6 +37,7 @@ library.
   - [QTS\_GetFalse](QuickJSFFI.md#qts-getfalse)
   - [QTS\_GetFloat64](QuickJSFFI.md#qts-getfloat64)
   - [QTS\_GetGlobalObject](QuickJSFFI.md#qts-getglobalobject)
+  - [QTS\_GetHostRefId](QuickJSFFI.md#qts-gethostrefid)
   - [QTS\_GetLength](QuickJSFFI.md#qts-getlength)
   - [QTS\_GetModuleNamespace](QuickJSFFI.md#qts-getmodulenamespace)
   - [QTS\_GetNull](QuickJSFFI.md#qts-getnull)
@@ -56,6 +57,7 @@ library.
   - [QTS\_NewError](QuickJSFFI.md#qts-newerror)
   - [QTS\_NewFloat64](QuickJSFFI.md#qts-newfloat64)
   - [QTS\_NewFunction](QuickJSFFI.md#qts-newfunction)
+  - [QTS\_NewHostRef](QuickJSFFI.md#qts-newhostref)
   - [QTS\_NewObject](QuickJSFFI.md#qts-newobject)
   - [QTS\_NewObjectProto](QuickJSFFI.md#qts-newobjectproto)
   - [QTS\_NewPromiseCapability](QuickJSFFI.md#qts-newpromisecapability)
@@ -96,7 +98,7 @@ Set at compile time.
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:346
+packages/quickjs-ffi-types/dist/index.d.ts:351
 
 ***
 
@@ -116,7 +118,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:346
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:406
+packages/quickjs-ffi-types/dist/index.d.ts:413
 
 ***
 
@@ -130,7 +132,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:406
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:404
+packages/quickjs-ffi-types/dist/index.d.ts:411
 
 ***
 
@@ -144,7 +146,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:404
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:403
+packages/quickjs-ffi-types/dist/index.d.ts:410
 
 ***
 
@@ -158,7 +160,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:403
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:353
+packages/quickjs-ffi-types/dist/index.d.ts:358
 
 ***
 
@@ -184,7 +186,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:353
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:388
+packages/quickjs-ffi-types/dist/index.d.ts:395
 
 ***
 
@@ -218,7 +220,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:388
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:386
+packages/quickjs-ffi-types/dist/index.d.ts:393
 
 ***
 
@@ -238,7 +240,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:386
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:390
+packages/quickjs-ffi-types/dist/index.d.ts:397
 
 ***
 
@@ -258,7 +260,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:390
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:367
+packages/quickjs-ffi-types/dist/index.d.ts:374
 
 ***
 
@@ -286,7 +288,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:367
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:391
+packages/quickjs-ffi-types/dist/index.d.ts:398
 
 ***
 
@@ -308,7 +310,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:391
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:382
+packages/quickjs-ffi-types/dist/index.d.ts:389
 
 ***
 
@@ -328,7 +330,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:382
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:366
+packages/quickjs-ffi-types/dist/index.d.ts:373
 
 ***
 
@@ -346,7 +348,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:366
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:362
+packages/quickjs-ffi-types/dist/index.d.ts:369
 
 ***
 
@@ -364,7 +366,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:362
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:360
+packages/quickjs-ffi-types/dist/index.d.ts:367
 
 ***
 
@@ -384,7 +386,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:360
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:363
+packages/quickjs-ffi-types/dist/index.d.ts:370
 
 ***
 
@@ -404,7 +406,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:363
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:364
+packages/quickjs-ffi-types/dist/index.d.ts:371
 
 ***
 
@@ -424,7 +426,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:364
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:365
+packages/quickjs-ffi-types/dist/index.d.ts:372
 
 ***
 
@@ -444,7 +446,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:365
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:376
+packages/quickjs-ffi-types/dist/index.d.ts:383
 
 ***
 
@@ -464,7 +466,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:376
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:377
+packages/quickjs-ffi-types/dist/index.d.ts:384
 
 ***
 
@@ -482,7 +484,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:377
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:401
+packages/quickjs-ffi-types/dist/index.d.ts:408
 
 ***
 
@@ -496,7 +498,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:401
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:357
+packages/quickjs-ffi-types/dist/index.d.ts:362
 
 ***
 
@@ -516,7 +518,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:357
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:373
+packages/quickjs-ffi-types/dist/index.d.ts:380
 
 ***
 
@@ -534,7 +536,25 @@ packages/quickjs-ffi-types/dist/index.d.ts:373
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:396
+packages/quickjs-ffi-types/dist/index.d.ts:403
+
+***
+
+### QTS\_GetHostRefId
+
+> **QTS\_GetHostRefId**: (`value`) => `HostRefId`
+
+#### Parameters
+
+• **value**: [`JSValueConstPointer`](../exports.md#jsvalueconstpointer) \| [`JSValuePointer`](../exports.md#jsvaluepointer)
+
+#### Returns
+
+`HostRefId`
+
+#### Source
+
+packages/quickjs-ffi-types/dist/index.d.ts:365
 
 ***
 
@@ -556,7 +576,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:396
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:394
+packages/quickjs-ffi-types/dist/index.d.ts:401
 
 ***
 
@@ -576,7 +596,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:394
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:392
+packages/quickjs-ffi-types/dist/index.d.ts:399
 
 ***
 
@@ -590,7 +610,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:392
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:356
+packages/quickjs-ffi-types/dist/index.d.ts:361
 
 ***
 
@@ -616,7 +636,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:356
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:387
+packages/quickjs-ffi-types/dist/index.d.ts:394
 
 ***
 
@@ -638,7 +658,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:387
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:383
+packages/quickjs-ffi-types/dist/index.d.ts:390
 
 ***
 
@@ -660,7 +680,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:383
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:384
+packages/quickjs-ffi-types/dist/index.d.ts:391
 
 ***
 
@@ -680,7 +700,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:384
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:375
+packages/quickjs-ffi-types/dist/index.d.ts:382
 
 ***
 
@@ -700,7 +720,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:375
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:379
+packages/quickjs-ffi-types/dist/index.d.ts:386
 
 ***
 
@@ -714,7 +734,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:379
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:358
+packages/quickjs-ffi-types/dist/index.d.ts:363
 
 ***
 
@@ -728,7 +748,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:358
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:355
+packages/quickjs-ffi-types/dist/index.d.ts:360
 
 ***
 
@@ -752,7 +772,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:355
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:395
+packages/quickjs-ffi-types/dist/index.d.ts:402
 
 ***
 
@@ -772,7 +792,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:395
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:380
+packages/quickjs-ffi-types/dist/index.d.ts:387
 
 ***
 
@@ -790,7 +810,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:380
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:381
+packages/quickjs-ffi-types/dist/index.d.ts:388
 
 ***
 
@@ -808,7 +828,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:381
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:370
+packages/quickjs-ffi-types/dist/index.d.ts:377
 
 ***
 
@@ -830,7 +850,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:370
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:371
+packages/quickjs-ffi-types/dist/index.d.ts:378
 
 ***
 
@@ -850,7 +870,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:371
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:361
+packages/quickjs-ffi-types/dist/index.d.ts:368
 
 ***
 
@@ -868,7 +888,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:361
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:348
+packages/quickjs-ffi-types/dist/index.d.ts:353
 
 ***
 
@@ -888,29 +908,53 @@ packages/quickjs-ffi-types/dist/index.d.ts:348
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:372
+packages/quickjs-ffi-types/dist/index.d.ts:379
 
 ***
 
 ### QTS\_NewFunction
 
-> **QTS\_NewFunction**: (`ctx`, `func_id`, `name`) => [`JSValuePointer`](../exports.md#jsvaluepointer)
+> **QTS\_NewFunction**: (`ctx`, `name`, `arg_length`, `is_constructor`, `host_ref_id`) => [`JSValuePointer`](../exports.md#jsvaluepointer)
 
 #### Parameters
 
 • **ctx**: [`JSContextPointer`](../exports.md#jscontextpointer)
 
-• **func\_id**: `number`
-
 • **name**: `string`
 
+• **arg\_length**: `number`
+
+• **is\_constructor**: `boolean`
+
+• **host\_ref\_id**: `HostRefId`
+
 #### Returns
 
 [`JSValuePointer`](../exports.md#jsvaluepointer)
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:405
+packages/quickjs-ffi-types/dist/index.d.ts:412
+
+***
+
+### QTS\_NewHostRef
+
+> **QTS\_NewHostRef**: (`ctx`, `id`) => [`JSValuePointer`](../exports.md#jsvaluepointer)
+
+#### Parameters
+
+• **ctx**: [`JSContextPointer`](../exports.md#jscontextpointer)
+
+• **id**: `HostRefId`
+
+#### Returns
+
+[`JSValuePointer`](../exports.md#jsvaluepointer)
+
+#### Source
+
+packages/quickjs-ffi-types/dist/index.d.ts:364
 
 ***
 
@@ -928,7 +972,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:405
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:368
+packages/quickjs-ffi-types/dist/index.d.ts:375
 
 ***
 
@@ -948,7 +992,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:368
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:369
+packages/quickjs-ffi-types/dist/index.d.ts:376
 
 ***
 
@@ -968,7 +1012,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:369
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:397
+packages/quickjs-ffi-types/dist/index.d.ts:404
 
 ***
 
@@ -982,7 +1026,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:397
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:359
+packages/quickjs-ffi-types/dist/index.d.ts:366
 
 ***
 
@@ -1002,7 +1046,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:359
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:374
+packages/quickjs-ffi-types/dist/index.d.ts:381
 
 ***
 
@@ -1024,7 +1068,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:374
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:378
+packages/quickjs-ffi-types/dist/index.d.ts:385
 
 ***
 
@@ -1044,7 +1088,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:378
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:399
+packages/quickjs-ffi-types/dist/index.d.ts:406
 
 ***
 
@@ -1064,7 +1108,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:399
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:398
+packages/quickjs-ffi-types/dist/index.d.ts:405
 
 ***
 
@@ -1078,7 +1122,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:398
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:352
+packages/quickjs-ffi-types/dist/index.d.ts:357
 
 ***
 
@@ -1098,7 +1142,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:352
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:389
+packages/quickjs-ffi-types/dist/index.d.ts:396
 
 ***
 
@@ -1118,7 +1162,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:389
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:350
+packages/quickjs-ffi-types/dist/index.d.ts:355
 
 ***
 
@@ -1136,7 +1180,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:350
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:408
+packages/quickjs-ffi-types/dist/index.d.ts:415
 
 ***
 
@@ -1154,7 +1198,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:408
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:410
+packages/quickjs-ffi-types/dist/index.d.ts:417
 
 ***
 
@@ -1172,7 +1216,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:410
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:351
+packages/quickjs-ffi-types/dist/index.d.ts:356
 
 ***
 
@@ -1190,7 +1234,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:351
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:407
+packages/quickjs-ffi-types/dist/index.d.ts:414
 
 ***
 
@@ -1210,7 +1254,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:407
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:409
+packages/quickjs-ffi-types/dist/index.d.ts:416
 
 ***
 
@@ -1230,7 +1274,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:409
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:354
+packages/quickjs-ffi-types/dist/index.d.ts:359
 
 ***
 
@@ -1250,7 +1294,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:354
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:349
+packages/quickjs-ffi-types/dist/index.d.ts:354
 
 ***
 
@@ -1270,7 +1314,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:349
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:402
+packages/quickjs-ffi-types/dist/index.d.ts:409
 
 ***
 
@@ -1294,7 +1338,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:402
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:385
+packages/quickjs-ffi-types/dist/index.d.ts:392
 
 ***
 
@@ -1312,7 +1356,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:385
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:400
+packages/quickjs-ffi-types/dist/index.d.ts:407
 
 ***
 
@@ -1332,7 +1376,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:400
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:347
+packages/quickjs-ffi-types/dist/index.d.ts:352
 
 ***
 
@@ -1352,7 +1396,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:347
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:393
+packages/quickjs-ffi-types/dist/index.d.ts:400
 
 ***
 
@@ -1372,7 +1416,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:393
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:412
+packages/quickjs-ffi-types/dist/index.d.ts:419
 
 ***
 
@@ -1392,7 +1436,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:412
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:411
+packages/quickjs-ffi-types/dist/index.d.ts:418
 
 ***
 
diff --git a/doc/quickjs-emscripten/interfaces/QuickJSSyncVariant.md b/doc/quickjs-emscripten/interfaces/QuickJSSyncVariant.md
index 5f0cc9566..8c0b7fc62 100644
--- a/doc/quickjs-emscripten/interfaces/QuickJSSyncVariant.md
+++ b/doc/quickjs-emscripten/interfaces/QuickJSSyncVariant.md
@@ -36,7 +36,7 @@ build variant to [newQuickJSWASMModule](../exports.md#newquickjswasmmodule) or [
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:520
+packages/quickjs-ffi-types/dist/index.d.ts:529
 
 ***
 
@@ -50,7 +50,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:520
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:521
+packages/quickjs-ffi-types/dist/index.d.ts:530
 
 ***
 
@@ -60,7 +60,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:521
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:519
+packages/quickjs-ffi-types/dist/index.d.ts:528
 
 ***
 
diff --git a/doc/quickjs-emscripten/interfaces/SourceMapData.md b/doc/quickjs-emscripten/interfaces/SourceMapData.md
index f4318f17a..a8e914fd1 100644
--- a/doc/quickjs-emscripten/interfaces/SourceMapData.md
+++ b/doc/quickjs-emscripten/interfaces/SourceMapData.md
@@ -22,7 +22,7 @@
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:205
+packages/quickjs-ffi-types/dist/index.d.ts:209
 
 ***
 
@@ -32,7 +32,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:205
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:204
+packages/quickjs-ffi-types/dist/index.d.ts:208
 
 ***
 
@@ -42,7 +42,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:204
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:203
+packages/quickjs-ffi-types/dist/index.d.ts:207
 
 ***
 
@@ -52,7 +52,7 @@ packages/quickjs-ffi-types/dist/index.d.ts:203
 
 #### Source
 
-packages/quickjs-ffi-types/dist/index.d.ts:202
+packages/quickjs-ffi-types/dist/index.d.ts:206
 
 ***
 
diff --git a/doc/quickjs-emscripten/namespaces/errors/README.md b/doc/quickjs-emscripten/namespaces/errors/README.md
index 9b6039da0..9347cf277 100644
--- a/doc/quickjs-emscripten/namespaces/errors/README.md
+++ b/doc/quickjs-emscripten/namespaces/errors/README.md
@@ -16,6 +16,8 @@ Collects the informative errors this library may throw.
 - [QuickJSAsyncifySuspended](classes/QuickJSAsyncifySuspended.md)
 - [QuickJSEmptyGetOwnPropertyNames](classes/QuickJSEmptyGetOwnPropertyNames.md)
 - [QuickJSEmscriptenModuleError](classes/QuickJSEmscriptenModuleError.md)
+- [QuickJSHostRefInvalid](classes/QuickJSHostRefInvalid.md)
+- [QuickJSHostRefRangeExceeded](classes/QuickJSHostRefRangeExceeded.md)
 - [QuickJSMemoryLeakDetected](classes/QuickJSMemoryLeakDetected.md)
 - [QuickJSNotImplemented](classes/QuickJSNotImplemented.md)
 - [QuickJSPromisePending](classes/QuickJSPromisePending.md)
diff --git a/doc/quickjs-emscripten/namespaces/errors/classes/QuickJSHostRefInvalid.md b/doc/quickjs-emscripten/namespaces/errors/classes/QuickJSHostRefInvalid.md
new file mode 100644
index 000000000..bebe75a4f
--- /dev/null
+++ b/doc/quickjs-emscripten/namespaces/errors/classes/QuickJSHostRefInvalid.md
@@ -0,0 +1,59 @@
+[quickjs-emscripten](../../../../packages.md) • **quickjs-emscripten** • [Readme](../../../README.md) \| [Exports](../../../exports.md)
+
+***
+
+[quickjs-emscripten](../../../../packages.md) / [quickjs-emscripten](../../../exports.md) / [errors](../README.md) / QuickJSHostRefInvalid
+
+# Class: QuickJSHostRefInvalid
+
+## Contents
+
+- [Extends](QuickJSHostRefInvalid.md#extends)
+- [Constructors](QuickJSHostRefInvalid.md#constructors)
+  - [new QuickJSHostRefInvalid(message)](QuickJSHostRefInvalid.md#new-quickjshostrefinvalidmessage)
+- [Properties](QuickJSHostRefInvalid.md#properties)
+  - [name](QuickJSHostRefInvalid.md#name)
+
+## Extends
+
+- `Error`
+
+## Constructors
+
+### new QuickJSHostRefInvalid(message)
+
+> **new QuickJSHostRefInvalid**(`message`?): [`QuickJSHostRefInvalid`](QuickJSHostRefInvalid.md)
+
+#### Parameters
+
+• **message?**: `string`
+
+#### Returns
+
+[`QuickJSHostRefInvalid`](QuickJSHostRefInvalid.md)
+
+#### Inherited from
+
+`Error.constructor`
+
+#### Source
+
+node\_modules/typescript/lib/lib.es5.d.ts:1081
+
+## Properties
+
+### name
+
+> **name**: `string` = `"QuickJSHostRefInvalid"`
+
+#### Overrides
+
+`Error.name`
+
+#### Source
+
+[packages/quickjs-emscripten-core/src/errors.ts:65](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/errors.ts#L65)
+
+***
+
+Generated using [typedoc-plugin-markdown](https://www.npmjs.com/package/typedoc-plugin-markdown) and [TypeDoc](https://typedoc.org/)
diff --git a/doc/quickjs-emscripten/namespaces/errors/classes/QuickJSHostRefRangeExceeded.md b/doc/quickjs-emscripten/namespaces/errors/classes/QuickJSHostRefRangeExceeded.md
new file mode 100644
index 000000000..b4a1ce64a
--- /dev/null
+++ b/doc/quickjs-emscripten/namespaces/errors/classes/QuickJSHostRefRangeExceeded.md
@@ -0,0 +1,59 @@
+[quickjs-emscripten](../../../../packages.md) • **quickjs-emscripten** • [Readme](../../../README.md) \| [Exports](../../../exports.md)
+
+***
+
+[quickjs-emscripten](../../../../packages.md) / [quickjs-emscripten](../../../exports.md) / [errors](../README.md) / QuickJSHostRefRangeExceeded
+
+# Class: QuickJSHostRefRangeExceeded
+
+## Contents
+
+- [Extends](QuickJSHostRefRangeExceeded.md#extends)
+- [Constructors](QuickJSHostRefRangeExceeded.md#constructors)
+  - [new QuickJSHostRefRangeExceeded(message)](QuickJSHostRefRangeExceeded.md#new-quickjshostrefrangeexceededmessage)
+- [Properties](QuickJSHostRefRangeExceeded.md#properties)
+  - [name](QuickJSHostRefRangeExceeded.md#name)
+
+## Extends
+
+- `Error`
+
+## Constructors
+
+### new QuickJSHostRefRangeExceeded(message)
+
+> **new QuickJSHostRefRangeExceeded**(`message`?): [`QuickJSHostRefRangeExceeded`](QuickJSHostRefRangeExceeded.md)
+
+#### Parameters
+
+• **message?**: `string`
+
+#### Returns
+
+[`QuickJSHostRefRangeExceeded`](QuickJSHostRefRangeExceeded.md)
+
+#### Inherited from
+
+`Error.constructor`
+
+#### Source
+
+node\_modules/typescript/lib/lib.es5.d.ts:1081
+
+## Properties
+
+### name
+
+> **name**: `string` = `"QuickJSHostRefRangeExceeded"`
+
+#### Overrides
+
+`Error.name`
+
+#### Source
+
+[packages/quickjs-emscripten-core/src/errors.ts:61](https://github.com/justjake/quickjs-emscripten/blob/main/packages/quickjs-emscripten-core/src/errors.ts#L61)
+
+***
+
+Generated using [typedoc-plugin-markdown](https://www.npmjs.com/package/typedoc-plugin-markdown) and [TypeDoc](https://typedoc.org/)
diff --git a/packages/quickjs-emscripten-core/src/context.ts b/packages/quickjs-emscripten-core/src/context.ts
index d2a19bdb0..9bc7c8a0d 100644
--- a/packages/quickjs-emscripten-core/src/context.ts
+++ b/packages/quickjs-emscripten-core/src/context.ts
@@ -13,6 +13,7 @@ import type {
   UInt32Pointer,
   JSValuePointerPointerPointer,
   JSVoidPointer,
+  HostRefId,
 } from "@jitl/quickjs-ffi-types"
 import type { JSPromiseState } from "./deferred-promise"
 import { QuickJSDeferredPromise } from "./deferred-promise"
@@ -20,6 +21,7 @@ import { QuickJSDeferredPromise } from "./deferred-promise"
 import type { shouldInterruptAfterDeadline } from "./interrupt-helpers"
 import {
   QuickJSEmptyGetOwnPropertyNames,
+  QuickJSHostRefInvalid,
   QuickJSNotImplemented,
   QuickJSPromisePending,
   QuickJSUnwrapError,
@@ -58,6 +60,7 @@ import type {
   VmPropertyDescriptor,
 } from "./vm-interface"
 import { QuickJSIterator } from "./QuickJSIterator"
+import { HostRef } from "./host-ref"
 
 export type QuickJSContextResult<S> = DisposableResult<S, QuickJSHandle>
 
@@ -129,8 +132,14 @@ class ContextMemory extends ModuleMemory implements Disposable {
     return str
   }
 
-  heapValueHandle(ptr: JSValuePointer): JSValue {
-    return new Lifetime(ptr, this.copyJSValue, this.freeJSValue, this.owner)
+  heapValueHandle(ptr: JSValuePointer, extraDispose?: () => void): JSValue {
+    const dispose: typeof this.freeJSValue = extraDispose
+      ? (val) => {
+          extraDispose()
+          this.freeJSValue(val)
+        }
+      : this.freeJSValue
+    return new Lifetime(ptr, this.copyJSValue, dispose, this.owner)
   }
 
   /** Manage a heap pointer with the lifetime of the context */
@@ -512,6 +521,8 @@ export class QuickJSContext
    * value. A VmFunctionImplementation should also not retain any references to
    * its return value.
    *
+   * For constructors (functions that will be called with `new ...`), use {@link newConstructorFunction}.
+   *
    * The function argument handles are automatically disposed when the function
    * returns. If you want to retain a handle beyond the end of the function, you
    * can call {@link Lifetime#dup} to create a copy of the handle that you own
@@ -598,10 +609,71 @@ export class QuickJSContext
    * return deferred.handle
    * ```
    */
-  newFunction(name: string, fn: VmFunctionImplementation<QuickJSHandle>): QuickJSHandle {
-    const fnId = ++this.fnNextId
-    this.setFunction(fnId, fn)
-    return this.memory.heapValueHandle(this.ffi.QTS_NewFunction(this.ctx.value, fnId, name))
+  newFunction(fn: VmFunctionImplementation<QuickJSHandle>): QuickJSHandle
+  newFunction(name: string | undefined, fn: VmFunctionImplementation<QuickJSHandle>): QuickJSHandle
+  newFunction(
+    nameOrFn: string | undefined | VmFunctionImplementation<QuickJSHandle>,
+    maybeFn?: VmFunctionImplementation<QuickJSHandle>,
+  ): QuickJSHandle {
+    const fn = typeof nameOrFn === "function" ? nameOrFn : maybeFn
+    if (!fn) {
+      throw new TypeError("Expected a function")
+    }
+
+    return this.newFunctionWithOptions({
+      name: typeof nameOrFn === "string" ? nameOrFn : undefined,
+      length: fn.length,
+      isConstructor: false,
+      fn,
+    })
+  }
+
+  /**
+   * Convert a Javascript function into a QuickJS constructor function.
+   * See {@link newFunction} for more details.
+   */
+  newConstructorFunction(fn: VmFunctionImplementation<QuickJSHandle>): QuickJSHandle
+  newConstructorFunction(
+    name: string | undefined,
+    fn: VmFunctionImplementation<QuickJSHandle>,
+  ): QuickJSHandle
+  newConstructorFunction(
+    nameOrFn: string | undefined | VmFunctionImplementation<QuickJSHandle>,
+    maybeFn?: VmFunctionImplementation<QuickJSHandle>,
+  ): QuickJSHandle {
+    const fn = typeof nameOrFn === "function" ? nameOrFn : maybeFn
+    if (!fn) {
+      throw new TypeError("Expected a function")
+    }
+
+    return this.newFunctionWithOptions({
+      name: typeof nameOrFn === "string" ? nameOrFn : undefined,
+      length: fn.length,
+      isConstructor: true,
+      fn,
+    })
+  }
+
+  /**
+   * Lower-level API for creating functions.
+   * See {@link newFunction} for more details on how to use functions.
+   */
+  newFunctionWithOptions(args: {
+    name: string | undefined
+    length: number
+    isConstructor: boolean
+    fn: VmFunctionImplementation<QuickJSHandle>
+  }): QuickJSHandle {
+    const { name, length, isConstructor, fn } = args
+    const refId = this.runtime.hostRefs.put(fn)
+    try {
+      return this.memory.heapValueHandle(
+        this.ffi.QTS_NewFunction(this.ctx.value, name ?? "", length, isConstructor, refId),
+      )
+    } catch (error) {
+      this.runtime.hostRefs.delete(refId)
+      throw error
+    }
   }
 
   newError(error: { name: string; message: string }): QuickJSHandle
@@ -632,6 +704,55 @@ export class QuickJSContext
     return errorHandle
   }
 
+  /**
+   * Create an opaque handle object that stores a reference to a host JavaScript object.
+   *
+   * The guest cannot access the host object directly, but you may use
+   * {@link getHostRef} to convert a HostRef handle back into a HostRef<T> from
+   * inside a function implementation.
+   *
+   * You must call {@link HostRef#dispose} or otherwise consume the {@link HostRef#handle} to ensure the handle is not leaked.
+   */
+  newHostRef<T extends object>(value: T): HostRef<T> {
+    const id = this.runtime.hostRefs.put(value)
+    try {
+      const handle = this.memory.heapValueHandle(this.ffi.QTS_NewHostRef(this.ctx.value, id))
+      return new HostRef(this.runtime, handle, id)
+    } catch (error) {
+      this.runtime.hostRefs.delete(id)
+      throw error
+    }
+  }
+
+  /**
+   * If `handle` is a `HostRef<T>.handle`, return a new `HostRef<T>` instance wrapping the handle.
+   *
+   * You must call {@link HostRef#dispose} or otherwise consume the {@link HostRef#handle} to ensure the handle is not leaked.
+   */
+  toHostRef<T extends object>(handle: QuickJSHandle): HostRef<T> | undefined {
+    const id = this.ffi.QTS_GetHostRefId(handle.value)
+    if (id === 0) {
+      return undefined
+    }
+
+    // Assert id is valid
+    this.runtime.hostRefs.get(id) as T
+    return new HostRef(this.runtime, handle.dup(), id)
+  }
+
+  /**
+   * If `handle` is a `HostRef<T>.handle`, return the host value `T`.
+   * @throws {@link QuickJSHostRefInvalid} if `handle` is not a `HostRef<T>.handle`
+   */
+  unwrapHostRef<T extends object>(handle: QuickJSHandle): T {
+    const id = this.ffi.QTS_GetHostRefId(handle.value)
+    if (id === 0) {
+      throw new QuickJSHostRefInvalid("handle is not a HostRef")
+    }
+
+    return this.runtime.hostRefs.get(id) as T
+  }
+
   // Read values --------------------------------------------------------------
 
   /**
@@ -1313,29 +1434,12 @@ export class QuickJSContext
   }
 
   /** @private */
-  protected fnNextId = -32768 // min value of signed 16bit int used by Quickjs
-  /** @private */
-  protected fnMaps = new Map<number, Map<number, VmFunctionImplementation<QuickJSHandle>>>()
-
-  /** @private */
-  protected getFunction(fn_id: number): VmFunctionImplementation<QuickJSHandle> | undefined {
-    const map_id = fn_id >> 8
-    const fnMap = this.fnMaps.get(map_id)
-    if (!fnMap) {
-      return undefined
-    }
-    return fnMap.get(fn_id)
-  }
-
-  /** @private */
-  protected setFunction(fn_id: number, handle: VmFunctionImplementation<QuickJSHandle>) {
-    const map_id = fn_id >> 8
-    let fnMap = this.fnMaps.get(map_id)
-    if (!fnMap) {
-      fnMap = new Map<number, VmFunctionImplementation<QuickJSHandle>>()
-      this.fnMaps.set(map_id, fnMap)
+  protected getFunction(fn_id: HostRefId): VmFunctionImplementation<QuickJSHandle> {
+    const fn = this.runtime.hostRefs.get(fn_id)
+    if (typeof fn !== "function") {
+      throw new Error(`Host reference ${fn_id} is not a function`)
     }
-    return fnMap.set(fn_id, handle)
+    return fn as VmFunctionImplementation<QuickJSHandle>
   }
 
   /**
@@ -1348,11 +1452,6 @@ export class QuickJSContext
       }
 
       const fn = this.getFunction(fn_id)
-      if (!fn) {
-        // this "throw" is not catch-able from the TS side. could we somehow handle this higher up?
-        throw new Error(`QuickJSContext had no callback with id ${fn_id}`)
-      }
-
       return Scope.withScopeMaybeAsync(this, function* (awaited, scope) {
         const thisHandle = scope.manage(
           new WeakLifetime(
diff --git a/packages/quickjs-emscripten-core/src/errors.ts b/packages/quickjs-emscripten-core/src/errors.ts
index af491e54c..510207431 100644
--- a/packages/quickjs-emscripten-core/src/errors.ts
+++ b/packages/quickjs-emscripten-core/src/errors.ts
@@ -56,3 +56,11 @@ export class QuickJSPromisePending extends Error {
 export class QuickJSEmptyGetOwnPropertyNames extends Error {
   name = "QuickJSEmptyGetOwnPropertyNames"
 }
+
+export class QuickJSHostRefRangeExceeded extends Error {
+  name = "QuickJSHostRefRangeExceeded"
+}
+
+export class QuickJSHostRefInvalid extends Error {
+  name = "QuickJSHostRefInvalid"
+}
diff --git a/packages/quickjs-emscripten-core/src/host-ref.test.ts b/packages/quickjs-emscripten-core/src/host-ref.test.ts
new file mode 100644
index 000000000..cc0028733
--- /dev/null
+++ b/packages/quickjs-emscripten-core/src/host-ref.test.ts
@@ -0,0 +1,237 @@
+import assert from "assert"
+import { describe, it } from "vitest"
+import { HostRefMap, INVALID_HOST_REF_ID } from "./host-ref"
+import { QuickJSHostRefInvalid, QuickJSHostRefRangeExceeded } from "./errors"
+
+const INT32_MAX = 2147483647
+
+describe("HostRefMap", () => {
+  describe("put", () => {
+    it("stores a value and returns an ID", () => {
+      const map = new HostRefMap()
+      const value = { name: "test" }
+      const id = map.put(value)
+      assert.notStrictEqual(id, INVALID_HOST_REF_ID)
+      assert.strictEqual(typeof id, "number")
+    })
+
+    it("returns unique IDs for different values", () => {
+      const map = new HostRefMap()
+      const id1 = map.put({ a: 1 })
+      const id2 = map.put({ b: 2 })
+      const id3 = map.put({ c: 3 })
+      assert.notStrictEqual(id1, id2)
+      assert.notStrictEqual(id2, id3)
+      assert.notStrictEqual(id1, id3)
+    })
+
+    it("never returns INVALID_HOST_REF_ID (0)", () => {
+      const map = new HostRefMap()
+      const ids: number[] = []
+      // Allocate enough IDs to potentially hit 0 if the implementation is wrong
+      for (let i = 0; i < 1000; i++) {
+        ids.push(map.put({ i }))
+      }
+      assert.ok(!ids.includes(INVALID_HOST_REF_ID))
+    })
+  })
+
+  describe("get", () => {
+    it("retrieves a stored value by ID", () => {
+      const map = new HostRefMap()
+      const value = { name: "test" }
+      const id = map.put(value)
+      const retrieved = map.get(id)
+      assert.strictEqual(retrieved, value)
+    })
+
+    it("throws QuickJSHostRefInvalid for INVALID_HOST_REF_ID", () => {
+      const map = new HostRefMap()
+      assert.throws(
+        () => map.get(INVALID_HOST_REF_ID),
+        (err) =>
+          err instanceof QuickJSHostRefInvalid &&
+          err.message.includes("no host reference id defined"),
+      )
+    })
+
+    it("throws QuickJSHostRefInvalid for non-existent ID", () => {
+      const map = new HostRefMap()
+      assert.throws(
+        () => map.get(12345 as any),
+        (err) => err instanceof QuickJSHostRefInvalid && err.message.includes("is not defined"),
+      )
+    })
+
+    it("throws QuickJSHostRefInvalid after value is deleted", () => {
+      const map = new HostRefMap()
+      const id = map.put({ value: "test" })
+      map.delete(id)
+      assert.throws(
+        () => map.get(id),
+        (err) => err instanceof QuickJSHostRefInvalid,
+      )
+    })
+  })
+
+  describe("delete", () => {
+    it("removes the value from the map", () => {
+      const map = new HostRefMap()
+      const value = { name: "test" }
+      const id = map.put(value)
+      map.delete(id)
+      assert.throws(() => map.get(id), QuickJSHostRefInvalid)
+    })
+
+    it("throws QuickJSHostRefInvalid for INVALID_HOST_REF_ID", () => {
+      const map = new HostRefMap()
+      assert.throws(
+        () => map.delete(INVALID_HOST_REF_ID),
+        (err) =>
+          err instanceof QuickJSHostRefInvalid &&
+          err.message.includes("no host reference id defined"),
+      )
+    })
+
+    it("throws QuickJSHostRefInvalid for non-existent ID", () => {
+      const map = new HostRefMap()
+      assert.throws(
+        () => map.delete(99999 as any),
+        (err) => err instanceof QuickJSHostRefInvalid && err.message.includes("is not defined"),
+      )
+    })
+
+    it("allows deleting the same ID only once", () => {
+      const map = new HostRefMap()
+      const id = map.put({ value: "test" })
+      map.delete(id)
+      assert.throws(() => map.delete(id), QuickJSHostRefInvalid)
+    })
+  })
+
+  describe("ID recycling (freelist)", () => {
+    it("reuses deleted IDs", () => {
+      const map = new HostRefMap()
+      const id1 = map.put({ first: true })
+      map.delete(id1)
+      const id2 = map.put({ second: true })
+      // The deleted ID should be reused
+      assert.strictEqual(id1, id2)
+    })
+
+    it("reuses IDs in FIFO order", () => {
+      const map = new HostRefMap()
+      const id1 = map.put({ a: 1 })
+      const id2 = map.put({ b: 2 })
+      const id3 = map.put({ c: 3 })
+
+      map.delete(id1)
+      map.delete(id2)
+
+      // Should reuse id1 first (FIFO)
+      const newId1 = map.put({ d: 4 })
+      assert.strictEqual(newId1, id1)
+
+      // Should reuse id2 next
+      const newId2 = map.put({ e: 5 })
+      assert.strictEqual(newId2, id2)
+
+      // Should allocate new ID
+      const newId3 = map.put({ f: 6 })
+      assert.notStrictEqual(newId3, id1)
+      assert.notStrictEqual(newId3, id2)
+      assert.notStrictEqual(newId3, id3)
+    })
+
+    it("recycled ID correctly stores new value", () => {
+      const map = new HostRefMap()
+      const oldValue = { old: true }
+      const newValue = { new: true }
+
+      const id = map.put(oldValue)
+      assert.strictEqual(map.get(id), oldValue)
+
+      map.delete(id)
+      const reusedId = map.put(newValue)
+
+      assert.strictEqual(id, reusedId)
+      assert.strictEqual(map.get(reusedId), newValue)
+    })
+  })
+
+  describe("multiple values", () => {
+    it("stores and retrieves multiple distinct values", () => {
+      const map = new HostRefMap()
+      const values = [{ a: 1 }, { b: 2 }, { c: 3 }, { d: 4 }, { e: 5 }]
+      const ids = values.map((v) => map.put(v))
+
+      for (let i = 0; i < values.length; i++) {
+        assert.strictEqual(map.get(ids[i]), values[i])
+      }
+    })
+
+    it("deleting one value does not affect others", () => {
+      const map = new HostRefMap()
+      const value1 = { first: true }
+      const value2 = { second: true }
+      const value3 = { third: true }
+
+      const id1 = map.put(value1)
+      const id2 = map.put(value2)
+      const id3 = map.put(value3)
+
+      map.delete(id2)
+
+      assert.strictEqual(map.get(id1), value1)
+      assert.throws(() => map.get(id2), QuickJSHostRefInvalid)
+      assert.strictEqual(map.get(id3), value3)
+    })
+  })
+
+  describe("group cleanup", () => {
+    it("cleans up empty groups when last entry is deleted", () => {
+      const map = new HostRefMap()
+      // Access private groups for testing
+      const groups = (map as any).groups as Map<number, Map<number, object>>
+
+      const id = map.put({ test: true })
+      const groupId = id >> 8
+
+      assert.ok(groups.has(groupId), "group should exist after put")
+      map.delete(id)
+      assert.ok(!groups.has(groupId), "group should be deleted when empty")
+    })
+  })
+
+  describe("range exceeded", () => {
+    it("throws QuickJSHostRefRangeExceeded when all IDs are exhausted", () => {
+      const map = new HostRefMap()
+      // Manipulate private nextId to be at the limit
+      ;(map as any).nextId = INT32_MAX
+
+      // First allocation at INT32_MAX should succeed
+      const id = map.put({ final: true })
+      assert.strictEqual(id, INT32_MAX)
+
+      // Next allocation should throw
+      assert.throws(
+        () => map.put({ overflow: true }),
+        (err) =>
+          err instanceof QuickJSHostRefRangeExceeded &&
+          err.message.includes("too many host refs created"),
+      )
+    })
+
+    it("can still use freelist even when range is exhausted", () => {
+      const map = new HostRefMap()
+      ;(map as any).nextId = INT32_MAX
+
+      const id = map.put({ value: 1 })
+      map.delete(id)
+
+      // Should be able to reuse the freed ID
+      const reusedId = map.put({ value: 2 })
+      assert.strictEqual(reusedId, id)
+    })
+  })
+})
diff --git a/packages/quickjs-emscripten-core/src/host-ref.ts b/packages/quickjs-emscripten-core/src/host-ref.ts
new file mode 100644
index 000000000..664f8c197
--- /dev/null
+++ b/packages/quickjs-emscripten-core/src/host-ref.ts
@@ -0,0 +1,137 @@
+import type { HostRefId } from "@jitl/quickjs-ffi-types"
+import { QuickJSHostRefInvalid, QuickJSHostRefRangeExceeded } from "./errors"
+import type { QuickJSHandle } from "./types"
+import type { QuickJSRuntime } from "./runtime"
+import { UsingDisposable } from "./lifetime"
+
+const INT32_MIN = -2147483648
+const INT32_MAX = 2147483647
+export const INVALID_HOST_REF_ID = 0 as HostRefId
+
+function getGroupId(id: HostRefId): number {
+  return id >> 8
+}
+
+/**
+ * HostRefMap stores references to host JavaScript based on an auto-incrementing id.
+ */
+export class HostRefMap {
+  private nextId = INT32_MIN
+  private freelist: HostRefId[] = []
+  private groups = new Map<number, Map<HostRefId, object>>()
+
+  put(value: object): HostRefId {
+    const id = this.allocateId()
+    const groupId = getGroupId(id)
+    let group = this.groups.get(groupId)
+    if (!group) {
+      group = new Map()
+      this.groups.set(groupId, group)
+    }
+    group.set(id, value)
+    return id
+  }
+
+  get(id: HostRefId): object {
+    if (id === INVALID_HOST_REF_ID) {
+      throw new QuickJSHostRefInvalid("no host reference id defined")
+    }
+
+    const groupId = getGroupId(id)
+    const group = this.groups.get(groupId)
+    if (!group) {
+      throw new QuickJSHostRefInvalid(`host reference id ${id} is not defined`)
+    }
+
+    const value = group.get(id)
+    if (!value) {
+      throw new QuickJSHostRefInvalid(`host reference id ${id} is not defined`)
+    }
+
+    return value
+  }
+
+  delete(id: HostRefId): void {
+    if (id === INVALID_HOST_REF_ID) {
+      throw new QuickJSHostRefInvalid("no host reference id defined")
+    }
+
+    const groupId = getGroupId(id)
+    const group = this.groups.get(groupId)
+    if (!group) {
+      throw new QuickJSHostRefInvalid(`host reference id ${id} is not defined`)
+    }
+
+    group.delete(id)
+    if (group.size === 0) {
+      this.groups.delete(groupId)
+    }
+
+    this.freelist.push(id)
+  }
+
+  private allocateId(): HostRefId {
+    if (this.freelist.length > 0) {
+      return this.freelist.shift()!
+    }
+
+    if (this.nextId === INVALID_HOST_REF_ID) {
+      this.nextId++
+    }
+
+    if (this.nextId > INT32_MAX) {
+      throw new QuickJSHostRefRangeExceeded(
+        `HostRefMap: too many host refs created without disposing. Max simultaneous host refs: ${
+          INT32_MAX - INT32_MIN
+        }`,
+      )
+    }
+
+    return this.nextId++ as HostRefId
+  }
+}
+
+/**
+ * HostRef represents a reference to a host value from a QuickJS guest.
+ *
+ * The host value is stored with a strong reference in a map within the runtime.
+ * Once all references to the HostRef's handle are disposed and there are no
+ * more references from the guest, the host value will be removed from the map.
+ *
+ * This abstraction allows passing values to the guest that need to keep a host
+ * value alive for their method callbacks.
+ *
+ * Note that there may be multiple HostRef instances pointing to the same host
+ * value slot in the runtime.
+ */
+export class HostRef<T extends object> extends UsingDisposable implements Disposable {
+  constructor(
+    public readonly runtime: QuickJSRuntime,
+    public readonly handle: QuickJSHandle,
+    public readonly id: HostRefId,
+  ) {
+    if (id === INVALID_HOST_REF_ID) {
+      throw new QuickJSHostRefInvalid("cannot create HostRef with undefined id")
+    }
+
+    super()
+  }
+
+  /** true if *this instance's* handle is alive */
+  get alive(): boolean {
+    return this.handle.alive
+  }
+
+  /** Dispose this instance's handle */
+  dispose(): void {
+    this.handle.dispose()
+  }
+
+  /**
+   * Retrieve the host value
+   * @throws {@link QuickJSHostRefInvalid} if the host value was freed once all reference handles were disposed
+   */
+  get value(): T {
+    return this.runtime.hostRefs.get(this.id) as T
+  }
+}
diff --git a/packages/quickjs-emscripten-core/src/lifetime.ts b/packages/quickjs-emscripten-core/src/lifetime.ts
index 5b97e43b0..cdd1c1d49 100644
--- a/packages/quickjs-emscripten-core/src/lifetime.ts
+++ b/packages/quickjs-emscripten-core/src/lifetime.ts
@@ -179,7 +179,7 @@ export class Lifetime<T, TCopy = never, Owner = never>
     this._alive = false
   }
 
-  private assertAlive() {
+  protected assertAlive() {
     if (!this.alive) {
       if (this._constructorStack) {
         throw new QuickJSUseAfterFree(
diff --git a/packages/quickjs-emscripten-core/src/module.ts b/packages/quickjs-emscripten-core/src/module.ts
index 787df7dbb..84de47dc0 100644
--- a/packages/quickjs-emscripten-core/src/module.ts
+++ b/packages/quickjs-emscripten-core/src/module.ts
@@ -42,17 +42,20 @@ export interface ContextCallbacks {
  * @private
  */
 export interface RuntimeCallbacks {
+  freeHostRef: MaybeAsyncEmscriptenCallbacks["freeHostRef"]
   shouldInterrupt: MaybeAsyncEmscriptenCallbacks["shouldInterrupt"]
   loadModuleSource: MaybeAsyncEmscriptenCallbacks["loadModuleSource"]
   normalizeModule: MaybeAsyncEmscriptenCallbacks["normalizeModule"]
 }
 
 class QuickJSEmscriptenModuleCallbacks implements EmscriptenModuleCallbacks {
+  public freeHostRef: EmscriptenModuleCallbacks["freeHostRef"]
   public callFunction: EmscriptenModuleCallbacks["callFunction"]
   public shouldInterrupt: EmscriptenModuleCallbacks["shouldInterrupt"]
   public loadModuleSource: EmscriptenModuleCallbacks["loadModuleSource"]
   public normalizeModule: EmscriptenModuleCallbacks["normalizeModule"]
   constructor(args: EmscriptenModuleCallbacks) {
+    this.freeHostRef = args.freeHostRef
     this.callFunction = args.callFunction
     this.shouldInterrupt = args.shouldInterrupt
     this.loadModuleSource = args.loadModuleSource
@@ -179,6 +182,16 @@ export class QuickJSModuleCallbacks {
   }
 
   private cToHostCallbacks = new QuickJSEmscriptenModuleCallbacks({
+    freeHostRef: (_asyncify, rt, host_ref_id) => {
+      const runtimeCallbacks = this.runtimeCallbacks.get(rt)
+      if (!runtimeCallbacks) {
+        throw new Error(
+          `QuickJSRuntime(rt = ${rt}) not found when trying to free HostRef(id = ${host_ref_id})`,
+        )
+      }
+      runtimeCallbacks.freeHostRef(rt, host_ref_id)
+    },
+
     callFunction: (asyncify, ctx, this_ptr, argc, argv, fn_id) =>
       this.handleAsyncify(asyncify, () => {
         try {
@@ -332,8 +345,10 @@ export class QuickJSWASMModule {
    */
   newRuntime(options: RuntimeOptions = {}): QuickJSRuntime {
     const rt = new Lifetime(this.ffi.QTS_NewRuntime(), undefined, (rt_ptr) => {
-      this.callbacks.deleteRuntime(rt_ptr)
+      // Free runtime first - this runs GC finalizers that may call back into JS
       this.ffi.QTS_FreeRuntime(rt_ptr)
+      // Then delete callbacks after finalizers have run
+      this.callbacks.deleteRuntime(rt_ptr)
     })
 
     const runtime = new QuickJSRuntime({
diff --git a/packages/quickjs-emscripten-core/src/runtime.ts b/packages/quickjs-emscripten-core/src/runtime.ts
index fd98b4068..e404f0648 100644
--- a/packages/quickjs-emscripten-core/src/runtime.ts
+++ b/packages/quickjs-emscripten-core/src/runtime.ts
@@ -16,6 +16,7 @@ import { ModuleMemory } from "./memory"
 import type { QuickJSModuleCallbacks, RuntimeCallbacks } from "./module"
 import type { ContextOptions, JSModuleLoader, JSModuleNormalizer, QuickJSHandle } from "./types"
 import { intrinsicsToFlags } from "./types"
+import { HostRefMap } from "./host-ref"
 
 /**
  * Callback called regularly while the VM executes code.
@@ -96,6 +97,8 @@ export class QuickJSRuntime extends UsingDisposable implements Disposable {
   protected moduleLoader: JSModuleLoader | undefined
   /** @private */
   protected moduleNormalizer: JSModuleNormalizer | undefined
+  /** @private */
+  hostRefs = new HostRefMap()
 
   /** @private */
   constructor(args: {
@@ -383,6 +386,14 @@ export class QuickJSRuntime extends UsingDisposable implements Disposable {
   }
 
   private cToHostCallbacks: RuntimeCallbacks = {
+    freeHostRef: (rt, host_ref_id) => {
+      if (rt !== this.rt.value) {
+        throw new Error("Runtime pointer mismatch")
+      }
+
+      this.hostRefs.delete(host_ref_id)
+    },
+
     shouldInterrupt: (rt) => {
       if (rt !== this.rt.value) {
         throw new Error("QuickJSContext instance received C -> JS interrupt with mismatched rt")
diff --git a/packages/quickjs-ffi-types/src/emscripten-types.ts b/packages/quickjs-ffi-types/src/emscripten-types.ts
index e4e080932..78fa7051e 100644
--- a/packages/quickjs-ffi-types/src/emscripten-types.ts
+++ b/packages/quickjs-ffi-types/src/emscripten-types.ts
@@ -18,6 +18,7 @@ import type {
   JSValueConstPointer,
   JSValuePointer,
   OwnedHeapCharPointer,
+  HostRefId,
 } from "./ffi-types"
 
 // eslint-disable-next-line @typescript-eslint/no-namespace
@@ -202,13 +203,19 @@ export interface Asyncify {
  * @private
  */
 export interface EmscriptenModuleCallbacks {
+  freeHostRef: (
+    asyncify: Asyncify | undefined,
+    rt: JSRuntimePointer,
+    host_ref_id: HostRefId,
+  ) => void
+
   callFunction: (
     asyncify: Asyncify | undefined,
     ctx: JSContextPointer,
     this_ptr: JSValueConstPointer,
     argc: number,
     argv: JSValueConstPointer,
-    fn_id: number,
+    host_ref_id: HostRefId,
   ) => JSValuePointer | AsyncifySleepResult<JSValuePointer>
 
   loadModuleSource: (
diff --git a/packages/quickjs-ffi-types/src/ffi-async.ts b/packages/quickjs-ffi-types/src/ffi-async.ts
index 8f50f7b23..e3aa0ad66 100644
--- a/packages/quickjs-ffi-types/src/ffi-async.ts
+++ b/packages/quickjs-ffi-types/src/ffi-async.ts
@@ -23,6 +23,7 @@ import {
   EvalDetectModule,
   GetOwnPropertyNamesFlags,
   IsEqualOp,
+  HostRefId,
   JSPromiseStateEnum,
   assertSync,
 } from "."
@@ -50,6 +51,8 @@ export interface QuickJSAsyncFFI {
   QTS_GetNull: () => JSValueConstPointer
   QTS_GetFalse: () => JSValueConstPointer
   QTS_GetTrue: () => JSValueConstPointer
+  QTS_NewHostRef: (ctx: JSContextPointer, id: HostRefId) => JSValuePointer
+  QTS_GetHostRefId: (value: JSValuePointer | JSValueConstPointer) => HostRefId
   QTS_NewRuntime: () => JSRuntimePointer
   QTS_FreeRuntime: (rt: JSRuntimePointer) => void
   QTS_NewContext: (rt: JSRuntimePointer, intrinsics: IntrinsicsFlags) => JSContextPointer
@@ -246,7 +249,13 @@ export interface QuickJSAsyncFFI {
   QTS_SetDebugLogEnabled: (rt: JSRuntimePointer, is_enabled: number) => void
   QTS_BuildIsDebug: () => number
   QTS_BuildIsAsyncify: () => number
-  QTS_NewFunction: (ctx: JSContextPointer, func_id: number, name: string) => JSValuePointer
+  QTS_NewFunction: (
+    ctx: JSContextPointer,
+    name: string,
+    arg_length: number,
+    is_constructor: boolean,
+    host_ref_id: HostRefId,
+  ) => JSValuePointer
   QTS_ArgvGetJSValueConstPointer: (
     argv: JSValuePointer | JSValueConstPointer,
     index: number,
diff --git a/packages/quickjs-ffi-types/src/ffi-types.ts b/packages/quickjs-ffi-types/src/ffi-types.ts
index b8c03033e..b55421792 100644
--- a/packages/quickjs-ffi-types/src/ffi-types.ts
+++ b/packages/quickjs-ffi-types/src/ffi-types.ts
@@ -125,6 +125,11 @@ export type GetOwnPropertyNamesFlags = Brand<number, "GetOwnPropertyNamesFlags">
  */
 export type IsEqualOp = Brand<number, "IsEqualOp">
 
+/**
+ * @private
+ */
+export type HostRefId = Brand<number, "HostRefId">
+
 /**
  * State of a promise.
  */
diff --git a/packages/quickjs-ffi-types/src/ffi.ts b/packages/quickjs-ffi-types/src/ffi.ts
index cf9a2096f..bf9e02c63 100644
--- a/packages/quickjs-ffi-types/src/ffi.ts
+++ b/packages/quickjs-ffi-types/src/ffi.ts
@@ -23,6 +23,7 @@ import {
   EvalDetectModule,
   GetOwnPropertyNamesFlags,
   IsEqualOp,
+  HostRefId,
   JSPromiseStateEnum,
 } from "."
 
@@ -49,6 +50,8 @@ export interface QuickJSFFI {
   QTS_GetNull: () => JSValueConstPointer
   QTS_GetFalse: () => JSValueConstPointer
   QTS_GetTrue: () => JSValueConstPointer
+  QTS_NewHostRef: (ctx: JSContextPointer, id: HostRefId) => JSValuePointer
+  QTS_GetHostRefId: (value: JSValuePointer | JSValueConstPointer) => HostRefId
   QTS_NewRuntime: () => JSRuntimePointer
   QTS_FreeRuntime: (rt: JSRuntimePointer) => void
   QTS_NewContext: (rt: JSRuntimePointer, intrinsics: IntrinsicsFlags) => JSContextPointer
@@ -194,7 +197,13 @@ export interface QuickJSFFI {
   QTS_SetDebugLogEnabled: (rt: JSRuntimePointer, is_enabled: number) => void
   QTS_BuildIsDebug: () => number
   QTS_BuildIsAsyncify: () => number
-  QTS_NewFunction: (ctx: JSContextPointer, func_id: number, name: string) => JSValuePointer
+  QTS_NewFunction: (
+    ctx: JSContextPointer,
+    name: string,
+    arg_length: number,
+    is_constructor: boolean,
+    host_ref_id: HostRefId,
+  ) => JSValuePointer
   QTS_ArgvGetJSValueConstPointer: (
     argv: JSValuePointer | JSValueConstPointer,
     index: number,
diff --git a/packages/variant-quickjs-asmjs-mjs-release-sync/src/ffi.ts b/packages/variant-quickjs-asmjs-mjs-release-sync/src/ffi.ts
index 419f408d7..17e6ccac9 100644
--- a/packages/variant-quickjs-asmjs-mjs-release-sync/src/ffi.ts
+++ b/packages/variant-quickjs-asmjs-mjs-release-sync/src/ffi.ts
@@ -23,6 +23,7 @@ import {
   EvalDetectModule,
   GetOwnPropertyNamesFlags,
   IsEqualOp,
+  HostRefId,
   JSPromiseStateEnum,
 } from "@jitl/quickjs-ffi-types"
 
@@ -83,6 +84,18 @@ export class QuickJSFFI {
 
   QTS_GetTrue: () => JSValueConstPointer = this.module.cwrap("QTS_GetTrue", "number", [])
 
+  QTS_NewHostRef: (ctx: JSContextPointer, id: HostRefId) => JSValuePointer = this.module.cwrap(
+    "QTS_NewHostRef",
+    "number",
+    ["number", "number"],
+  )
+
+  QTS_GetHostRefId: (value: JSValuePointer | JSValueConstPointer) => HostRefId = this.module.cwrap(
+    "QTS_GetHostRefId",
+    "number",
+    ["number"],
+  )
+
   QTS_NewRuntime: () => JSRuntimePointer = this.module.cwrap("QTS_NewRuntime", "number", [])
 
   QTS_FreeRuntime: (rt: JSRuntimePointer) => void = this.module.cwrap("QTS_FreeRuntime", null, [
@@ -375,8 +388,19 @@ export class QuickJSFFI {
 
   QTS_BuildIsAsyncify: () => number = this.module.cwrap("QTS_BuildIsAsyncify", "number", [])
 
-  QTS_NewFunction: (ctx: JSContextPointer, func_id: number, name: string) => JSValuePointer =
-    this.module.cwrap("QTS_NewFunction", "number", ["number", "number", "string"])
+  QTS_NewFunction: (
+    ctx: JSContextPointer,
+    name: string,
+    arg_length: number,
+    is_constructor: boolean,
+    host_ref_id: HostRefId,
+  ) => JSValuePointer = this.module.cwrap("QTS_NewFunction", "number", [
+    "number",
+    "string",
+    "number",
+    "boolean",
+    "number",
+  ])
 
   QTS_ArgvGetJSValueConstPointer: (
     argv: JSValuePointer | JSValueConstPointer,
diff --git a/packages/variant-quickjs-ng-wasmfile-debug-asyncify/src/ffi.ts b/packages/variant-quickjs-ng-wasmfile-debug-asyncify/src/ffi.ts
index ee3ce88b3..a154293f8 100644
--- a/packages/variant-quickjs-ng-wasmfile-debug-asyncify/src/ffi.ts
+++ b/packages/variant-quickjs-ng-wasmfile-debug-asyncify/src/ffi.ts
@@ -23,6 +23,7 @@ import {
   EvalDetectModule,
   GetOwnPropertyNamesFlags,
   IsEqualOp,
+  HostRefId,
   JSPromiseStateEnum,
   assertSync,
 } from "@jitl/quickjs-ffi-types"
@@ -84,6 +85,18 @@ export class QuickJSAsyncFFI {
 
   QTS_GetTrue: () => JSValueConstPointer = this.module.cwrap("QTS_GetTrue", "number", [])
 
+  QTS_NewHostRef: (ctx: JSContextPointer, id: HostRefId) => JSValuePointer = this.module.cwrap(
+    "QTS_NewHostRef",
+    "number",
+    ["number", "number"],
+  )
+
+  QTS_GetHostRefId: (value: JSValuePointer | JSValueConstPointer) => HostRefId = this.module.cwrap(
+    "QTS_GetHostRefId",
+    "number",
+    ["number"],
+  )
+
   QTS_NewRuntime: () => JSRuntimePointer = this.module.cwrap("QTS_NewRuntime", "number", [])
 
   QTS_FreeRuntime: (rt: JSRuntimePointer) => void = this.module.cwrap("QTS_FreeRuntime", null, [
@@ -482,8 +495,19 @@ export class QuickJSAsyncFFI {
 
   QTS_BuildIsAsyncify: () => number = this.module.cwrap("QTS_BuildIsAsyncify", "number", [])
 
-  QTS_NewFunction: (ctx: JSContextPointer, func_id: number, name: string) => JSValuePointer =
-    this.module.cwrap("QTS_NewFunction", "number", ["number", "number", "string"])
+  QTS_NewFunction: (
+    ctx: JSContextPointer,
+    name: string,
+    arg_length: number,
+    is_constructor: boolean,
+    host_ref_id: HostRefId,
+  ) => JSValuePointer = this.module.cwrap("QTS_NewFunction", "number", [
+    "number",
+    "string",
+    "number",
+    "boolean",
+    "number",
+  ])
 
   QTS_ArgvGetJSValueConstPointer: (
     argv: JSValuePointer | JSValueConstPointer,
diff --git a/packages/variant-quickjs-ng-wasmfile-debug-sync/src/ffi.ts b/packages/variant-quickjs-ng-wasmfile-debug-sync/src/ffi.ts
index 323a3abcf..6740134db 100644
--- a/packages/variant-quickjs-ng-wasmfile-debug-sync/src/ffi.ts
+++ b/packages/variant-quickjs-ng-wasmfile-debug-sync/src/ffi.ts
@@ -23,6 +23,7 @@ import {
   EvalDetectModule,
   GetOwnPropertyNamesFlags,
   IsEqualOp,
+  HostRefId,
   JSPromiseStateEnum,
 } from "@jitl/quickjs-ffi-types"
 
@@ -83,6 +84,18 @@ export class QuickJSFFI {
 
   QTS_GetTrue: () => JSValueConstPointer = this.module.cwrap("QTS_GetTrue", "number", [])
 
+  QTS_NewHostRef: (ctx: JSContextPointer, id: HostRefId) => JSValuePointer = this.module.cwrap(
+    "QTS_NewHostRef",
+    "number",
+    ["number", "number"],
+  )
+
+  QTS_GetHostRefId: (value: JSValuePointer | JSValueConstPointer) => HostRefId = this.module.cwrap(
+    "QTS_GetHostRefId",
+    "number",
+    ["number"],
+  )
+
   QTS_NewRuntime: () => JSRuntimePointer = this.module.cwrap("QTS_NewRuntime", "number", [])
 
   QTS_FreeRuntime: (rt: JSRuntimePointer) => void = this.module.cwrap("QTS_FreeRuntime", null, [
@@ -375,8 +388,19 @@ export class QuickJSFFI {
 
   QTS_BuildIsAsyncify: () => number = this.module.cwrap("QTS_BuildIsAsyncify", "number", [])
 
-  QTS_NewFunction: (ctx: JSContextPointer, func_id: number, name: string) => JSValuePointer =
-    this.module.cwrap("QTS_NewFunction", "number", ["number", "number", "string"])
+  QTS_NewFunction: (
+    ctx: JSContextPointer,
+    name: string,
+    arg_length: number,
+    is_constructor: boolean,
+    host_ref_id: HostRefId,
+  ) => JSValuePointer = this.module.cwrap("QTS_NewFunction", "number", [
+    "number",
+    "string",
+    "number",
+    "boolean",
+    "number",
+  ])
 
   QTS_ArgvGetJSValueConstPointer: (
     argv: JSValuePointer | JSValueConstPointer,
diff --git a/packages/variant-quickjs-ng-wasmfile-release-asyncify/src/ffi.ts b/packages/variant-quickjs-ng-wasmfile-release-asyncify/src/ffi.ts
index 83989cf6d..e89c9b41c 100644
--- a/packages/variant-quickjs-ng-wasmfile-release-asyncify/src/ffi.ts
+++ b/packages/variant-quickjs-ng-wasmfile-release-asyncify/src/ffi.ts
@@ -23,6 +23,7 @@ import {
   EvalDetectModule,
   GetOwnPropertyNamesFlags,
   IsEqualOp,
+  HostRefId,
   JSPromiseStateEnum,
   assertSync,
 } from "@jitl/quickjs-ffi-types"
@@ -84,6 +85,18 @@ export class QuickJSAsyncFFI {
 
   QTS_GetTrue: () => JSValueConstPointer = this.module.cwrap("QTS_GetTrue", "number", [])
 
+  QTS_NewHostRef: (ctx: JSContextPointer, id: HostRefId) => JSValuePointer = this.module.cwrap(
+    "QTS_NewHostRef",
+    "number",
+    ["number", "number"],
+  )
+
+  QTS_GetHostRefId: (value: JSValuePointer | JSValueConstPointer) => HostRefId = this.module.cwrap(
+    "QTS_GetHostRefId",
+    "number",
+    ["number"],
+  )
+
   QTS_NewRuntime: () => JSRuntimePointer = this.module.cwrap("QTS_NewRuntime", "number", [])
 
   QTS_FreeRuntime: (rt: JSRuntimePointer) => void = this.module.cwrap("QTS_FreeRuntime", null, [
@@ -479,8 +492,19 @@ export class QuickJSAsyncFFI {
 
   QTS_BuildIsAsyncify: () => number = this.module.cwrap("QTS_BuildIsAsyncify", "number", [])
 
-  QTS_NewFunction: (ctx: JSContextPointer, func_id: number, name: string) => JSValuePointer =
-    this.module.cwrap("QTS_NewFunction", "number", ["number", "number", "string"])
+  QTS_NewFunction: (
+    ctx: JSContextPointer,
+    name: string,
+    arg_length: number,
+    is_constructor: boolean,
+    host_ref_id: HostRefId,
+  ) => JSValuePointer = this.module.cwrap("QTS_NewFunction", "number", [
+    "number",
+    "string",
+    "number",
+    "boolean",
+    "number",
+  ])
 
   QTS_ArgvGetJSValueConstPointer: (
     argv: JSValuePointer | JSValueConstPointer,
diff --git a/packages/variant-quickjs-ng-wasmfile-release-sync/src/ffi.ts b/packages/variant-quickjs-ng-wasmfile-release-sync/src/ffi.ts
index 419f408d7..17e6ccac9 100644
--- a/packages/variant-quickjs-ng-wasmfile-release-sync/src/ffi.ts
+++ b/packages/variant-quickjs-ng-wasmfile-release-sync/src/ffi.ts
@@ -23,6 +23,7 @@ import {
   EvalDetectModule,
   GetOwnPropertyNamesFlags,
   IsEqualOp,
+  HostRefId,
   JSPromiseStateEnum,
 } from "@jitl/quickjs-ffi-types"
 
@@ -83,6 +84,18 @@ export class QuickJSFFI {
 
   QTS_GetTrue: () => JSValueConstPointer = this.module.cwrap("QTS_GetTrue", "number", [])
 
+  QTS_NewHostRef: (ctx: JSContextPointer, id: HostRefId) => JSValuePointer = this.module.cwrap(
+    "QTS_NewHostRef",
+    "number",
+    ["number", "number"],
+  )
+
+  QTS_GetHostRefId: (value: JSValuePointer | JSValueConstPointer) => HostRefId = this.module.cwrap(
+    "QTS_GetHostRefId",
+    "number",
+    ["number"],
+  )
+
   QTS_NewRuntime: () => JSRuntimePointer = this.module.cwrap("QTS_NewRuntime", "number", [])
 
   QTS_FreeRuntime: (rt: JSRuntimePointer) => void = this.module.cwrap("QTS_FreeRuntime", null, [
@@ -375,8 +388,19 @@ export class QuickJSFFI {
 
   QTS_BuildIsAsyncify: () => number = this.module.cwrap("QTS_BuildIsAsyncify", "number", [])
 
-  QTS_NewFunction: (ctx: JSContextPointer, func_id: number, name: string) => JSValuePointer =
-    this.module.cwrap("QTS_NewFunction", "number", ["number", "number", "string"])
+  QTS_NewFunction: (
+    ctx: JSContextPointer,
+    name: string,
+    arg_length: number,
+    is_constructor: boolean,
+    host_ref_id: HostRefId,
+  ) => JSValuePointer = this.module.cwrap("QTS_NewFunction", "number", [
+    "number",
+    "string",
+    "number",
+    "boolean",
+    "number",
+  ])
 
   QTS_ArgvGetJSValueConstPointer: (
     argv: JSValuePointer | JSValueConstPointer,
diff --git a/packages/variant-quickjs-singlefile-browser-debug-asyncify/src/ffi.ts b/packages/variant-quickjs-singlefile-browser-debug-asyncify/src/ffi.ts
index ee3ce88b3..a154293f8 100644
--- a/packages/variant-quickjs-singlefile-browser-debug-asyncify/src/ffi.ts
+++ b/packages/variant-quickjs-singlefile-browser-debug-asyncify/src/ffi.ts
@@ -23,6 +23,7 @@ import {
   EvalDetectModule,
   GetOwnPropertyNamesFlags,
   IsEqualOp,
+  HostRefId,
   JSPromiseStateEnum,
   assertSync,
 } from "@jitl/quickjs-ffi-types"
@@ -84,6 +85,18 @@ export class QuickJSAsyncFFI {
 
   QTS_GetTrue: () => JSValueConstPointer = this.module.cwrap("QTS_GetTrue", "number", [])
 
+  QTS_NewHostRef: (ctx: JSContextPointer, id: HostRefId) => JSValuePointer = this.module.cwrap(
+    "QTS_NewHostRef",
+    "number",
+    ["number", "number"],
+  )
+
+  QTS_GetHostRefId: (value: JSValuePointer | JSValueConstPointer) => HostRefId = this.module.cwrap(
+    "QTS_GetHostRefId",
+    "number",
+    ["number"],
+  )
+
   QTS_NewRuntime: () => JSRuntimePointer = this.module.cwrap("QTS_NewRuntime", "number", [])
 
   QTS_FreeRuntime: (rt: JSRuntimePointer) => void = this.module.cwrap("QTS_FreeRuntime", null, [
@@ -482,8 +495,19 @@ export class QuickJSAsyncFFI {
 
   QTS_BuildIsAsyncify: () => number = this.module.cwrap("QTS_BuildIsAsyncify", "number", [])
 
-  QTS_NewFunction: (ctx: JSContextPointer, func_id: number, name: string) => JSValuePointer =
-    this.module.cwrap("QTS_NewFunction", "number", ["number", "number", "string"])
+  QTS_NewFunction: (
+    ctx: JSContextPointer,
+    name: string,
+    arg_length: number,
+    is_constructor: boolean,
+    host_ref_id: HostRefId,
+  ) => JSValuePointer = this.module.cwrap("QTS_NewFunction", "number", [
+    "number",
+    "string",
+    "number",
+    "boolean",
+    "number",
+  ])
 
   QTS_ArgvGetJSValueConstPointer: (
     argv: JSValuePointer | JSValueConstPointer,
diff --git a/packages/variant-quickjs-singlefile-browser-debug-sync/src/ffi.ts b/packages/variant-quickjs-singlefile-browser-debug-sync/src/ffi.ts
index 323a3abcf..6740134db 100644
--- a/packages/variant-quickjs-singlefile-browser-debug-sync/src/ffi.ts
+++ b/packages/variant-quickjs-singlefile-browser-debug-sync/src/ffi.ts
@@ -23,6 +23,7 @@ import {
   EvalDetectModule,
   GetOwnPropertyNamesFlags,
   IsEqualOp,
+  HostRefId,
   JSPromiseStateEnum,
 } from "@jitl/quickjs-ffi-types"
 
@@ -83,6 +84,18 @@ export class QuickJSFFI {
 
   QTS_GetTrue: () => JSValueConstPointer = this.module.cwrap("QTS_GetTrue", "number", [])
 
+  QTS_NewHostRef: (ctx: JSContextPointer, id: HostRefId) => JSValuePointer = this.module.cwrap(
+    "QTS_NewHostRef",
+    "number",
+    ["number", "number"],
+  )
+
+  QTS_GetHostRefId: (value: JSValuePointer | JSValueConstPointer) => HostRefId = this.module.cwrap(
+    "QTS_GetHostRefId",
+    "number",
+    ["number"],
+  )
+
   QTS_NewRuntime: () => JSRuntimePointer = this.module.cwrap("QTS_NewRuntime", "number", [])
 
   QTS_FreeRuntime: (rt: JSRuntimePointer) => void = this.module.cwrap("QTS_FreeRuntime", null, [
@@ -375,8 +388,19 @@ export class QuickJSFFI {
 
   QTS_BuildIsAsyncify: () => number = this.module.cwrap("QTS_BuildIsAsyncify", "number", [])
 
-  QTS_NewFunction: (ctx: JSContextPointer, func_id: number, name: string) => JSValuePointer =
-    this.module.cwrap("QTS_NewFunction", "number", ["number", "number", "string"])
+  QTS_NewFunction: (
+    ctx: JSContextPointer,
+    name: string,
+    arg_length: number,
+    is_constructor: boolean,
+    host_ref_id: HostRefId,
+  ) => JSValuePointer = this.module.cwrap("QTS_NewFunction", "number", [
+    "number",
+    "string",
+    "number",
+    "boolean",
+    "number",
+  ])
 
   QTS_ArgvGetJSValueConstPointer: (
     argv: JSValuePointer | JSValueConstPointer,
diff --git a/packages/variant-quickjs-singlefile-browser-release-asyncify/src/ffi.ts b/packages/variant-quickjs-singlefile-browser-release-asyncify/src/ffi.ts
index 83989cf6d..e89c9b41c 100644
--- a/packages/variant-quickjs-singlefile-browser-release-asyncify/src/ffi.ts
+++ b/packages/variant-quickjs-singlefile-browser-release-asyncify/src/ffi.ts
@@ -23,6 +23,7 @@ import {
   EvalDetectModule,
   GetOwnPropertyNamesFlags,
   IsEqualOp,
+  HostRefId,
   JSPromiseStateEnum,
   assertSync,
 } from "@jitl/quickjs-ffi-types"
@@ -84,6 +85,18 @@ export class QuickJSAsyncFFI {
 
   QTS_GetTrue: () => JSValueConstPointer = this.module.cwrap("QTS_GetTrue", "number", [])
 
+  QTS_NewHostRef: (ctx: JSContextPointer, id: HostRefId) => JSValuePointer = this.module.cwrap(
+    "QTS_NewHostRef",
+    "number",
+    ["number", "number"],
+  )
+
+  QTS_GetHostRefId: (value: JSValuePointer | JSValueConstPointer) => HostRefId = this.module.cwrap(
+    "QTS_GetHostRefId",
+    "number",
+    ["number"],
+  )
+
   QTS_NewRuntime: () => JSRuntimePointer = this.module.cwrap("QTS_NewRuntime", "number", [])
 
   QTS_FreeRuntime: (rt: JSRuntimePointer) => void = this.module.cwrap("QTS_FreeRuntime", null, [
@@ -479,8 +492,19 @@ export class QuickJSAsyncFFI {
 
   QTS_BuildIsAsyncify: () => number = this.module.cwrap("QTS_BuildIsAsyncify", "number", [])
 
-  QTS_NewFunction: (ctx: JSContextPointer, func_id: number, name: string) => JSValuePointer =
-    this.module.cwrap("QTS_NewFunction", "number", ["number", "number", "string"])
+  QTS_NewFunction: (
+    ctx: JSContextPointer,
+    name: string,
+    arg_length: number,
+    is_constructor: boolean,
+    host_ref_id: HostRefId,
+  ) => JSValuePointer = this.module.cwrap("QTS_NewFunction", "number", [
+    "number",
+    "string",
+    "number",
+    "boolean",
+    "number",
+  ])
 
   QTS_ArgvGetJSValueConstPointer: (
     argv: JSValuePointer | JSValueConstPointer,
diff --git a/packages/variant-quickjs-singlefile-browser-release-sync/src/ffi.ts b/packages/variant-quickjs-singlefile-browser-release-sync/src/ffi.ts
index 419f408d7..17e6ccac9 100644
--- a/packages/variant-quickjs-singlefile-browser-release-sync/src/ffi.ts
+++ b/packages/variant-quickjs-singlefile-browser-release-sync/src/ffi.ts
@@ -23,6 +23,7 @@ import {
   EvalDetectModule,
   GetOwnPropertyNamesFlags,
   IsEqualOp,
+  HostRefId,
   JSPromiseStateEnum,
 } from "@jitl/quickjs-ffi-types"
 
@@ -83,6 +84,18 @@ export class QuickJSFFI {
 
   QTS_GetTrue: () => JSValueConstPointer = this.module.cwrap("QTS_GetTrue", "number", [])
 
+  QTS_NewHostRef: (ctx: JSContextPointer, id: HostRefId) => JSValuePointer = this.module.cwrap(
+    "QTS_NewHostRef",
+    "number",
+    ["number", "number"],
+  )
+
+  QTS_GetHostRefId: (value: JSValuePointer | JSValueConstPointer) => HostRefId = this.module.cwrap(
+    "QTS_GetHostRefId",
+    "number",
+    ["number"],
+  )
+
   QTS_NewRuntime: () => JSRuntimePointer = this.module.cwrap("QTS_NewRuntime", "number", [])
 
   QTS_FreeRuntime: (rt: JSRuntimePointer) => void = this.module.cwrap("QTS_FreeRuntime", null, [
@@ -375,8 +388,19 @@ export class QuickJSFFI {
 
   QTS_BuildIsAsyncify: () => number = this.module.cwrap("QTS_BuildIsAsyncify", "number", [])
 
-  QTS_NewFunction: (ctx: JSContextPointer, func_id: number, name: string) => JSValuePointer =
-    this.module.cwrap("QTS_NewFunction", "number", ["number", "number", "string"])
+  QTS_NewFunction: (
+    ctx: JSContextPointer,
+    name: string,
+    arg_length: number,
+    is_constructor: boolean,
+    host_ref_id: HostRefId,
+  ) => JSValuePointer = this.module.cwrap("QTS_NewFunction", "number", [
+    "number",
+    "string",
+    "number",
+    "boolean",
+    "number",
+  ])
 
   QTS_ArgvGetJSValueConstPointer: (
     argv: JSValuePointer | JSValueConstPointer,
diff --git a/packages/variant-quickjs-singlefile-cjs-debug-asyncify/src/ffi.ts b/packages/variant-quickjs-singlefile-cjs-debug-asyncify/src/ffi.ts
index ee3ce88b3..a154293f8 100644
--- a/packages/variant-quickjs-singlefile-cjs-debug-asyncify/src/ffi.ts
+++ b/packages/variant-quickjs-singlefile-cjs-debug-asyncify/src/ffi.ts
@@ -23,6 +23,7 @@ import {
   EvalDetectModule,
   GetOwnPropertyNamesFlags,
   IsEqualOp,
+  HostRefId,
   JSPromiseStateEnum,
   assertSync,
 } from "@jitl/quickjs-ffi-types"
@@ -84,6 +85,18 @@ export class QuickJSAsyncFFI {
 
   QTS_GetTrue: () => JSValueConstPointer = this.module.cwrap("QTS_GetTrue", "number", [])
 
+  QTS_NewHostRef: (ctx: JSContextPointer, id: HostRefId) => JSValuePointer = this.module.cwrap(
+    "QTS_NewHostRef",
+    "number",
+    ["number", "number"],
+  )
+
+  QTS_GetHostRefId: (value: JSValuePointer | JSValueConstPointer) => HostRefId = this.module.cwrap(
+    "QTS_GetHostRefId",
+    "number",
+    ["number"],
+  )
+
   QTS_NewRuntime: () => JSRuntimePointer = this.module.cwrap("QTS_NewRuntime", "number", [])
 
   QTS_FreeRuntime: (rt: JSRuntimePointer) => void = this.module.cwrap("QTS_FreeRuntime", null, [
@@ -482,8 +495,19 @@ export class QuickJSAsyncFFI {
 
   QTS_BuildIsAsyncify: () => number = this.module.cwrap("QTS_BuildIsAsyncify", "number", [])
 
-  QTS_NewFunction: (ctx: JSContextPointer, func_id: number, name: string) => JSValuePointer =
-    this.module.cwrap("QTS_NewFunction", "number", ["number", "number", "string"])
+  QTS_NewFunction: (
+    ctx: JSContextPointer,
+    name: string,
+    arg_length: number,
+    is_constructor: boolean,
+    host_ref_id: HostRefId,
+  ) => JSValuePointer = this.module.cwrap("QTS_NewFunction", "number", [
+    "number",
+    "string",
+    "number",
+    "boolean",
+    "number",
+  ])
 
   QTS_ArgvGetJSValueConstPointer: (
     argv: JSValuePointer | JSValueConstPointer,
diff --git a/packages/variant-quickjs-singlefile-cjs-debug-sync/src/ffi.ts b/packages/variant-quickjs-singlefile-cjs-debug-sync/src/ffi.ts
index 323a3abcf..6740134db 100644
--- a/packages/variant-quickjs-singlefile-cjs-debug-sync/src/ffi.ts
+++ b/packages/variant-quickjs-singlefile-cjs-debug-sync/src/ffi.ts
@@ -23,6 +23,7 @@ import {
   EvalDetectModule,
   GetOwnPropertyNamesFlags,
   IsEqualOp,
+  HostRefId,
   JSPromiseStateEnum,
 } from "@jitl/quickjs-ffi-types"
 
@@ -83,6 +84,18 @@ export class QuickJSFFI {
 
   QTS_GetTrue: () => JSValueConstPointer = this.module.cwrap("QTS_GetTrue", "number", [])
 
+  QTS_NewHostRef: (ctx: JSContextPointer, id: HostRefId) => JSValuePointer = this.module.cwrap(
+    "QTS_NewHostRef",
+    "number",
+    ["number", "number"],
+  )
+
+  QTS_GetHostRefId: (value: JSValuePointer | JSValueConstPointer) => HostRefId = this.module.cwrap(
+    "QTS_GetHostRefId",
+    "number",
+    ["number"],
+  )
+
   QTS_NewRuntime: () => JSRuntimePointer = this.module.cwrap("QTS_NewRuntime", "number", [])
 
   QTS_FreeRuntime: (rt: JSRuntimePointer) => void = this.module.cwrap("QTS_FreeRuntime", null, [
@@ -375,8 +388,19 @@ export class QuickJSFFI {
 
   QTS_BuildIsAsyncify: () => number = this.module.cwrap("QTS_BuildIsAsyncify", "number", [])
 
-  QTS_NewFunction: (ctx: JSContextPointer, func_id: number, name: string) => JSValuePointer =
-    this.module.cwrap("QTS_NewFunction", "number", ["number", "number", "string"])
+  QTS_NewFunction: (
+    ctx: JSContextPointer,
+    name: string,
+    arg_length: number,
+    is_constructor: boolean,
+    host_ref_id: HostRefId,
+  ) => JSValuePointer = this.module.cwrap("QTS_NewFunction", "number", [
+    "number",
+    "string",
+    "number",
+    "boolean",
+    "number",
+  ])
 
   QTS_ArgvGetJSValueConstPointer: (
     argv: JSValuePointer | JSValueConstPointer,
diff --git a/packages/variant-quickjs-singlefile-cjs-release-asyncify/src/ffi.ts b/packages/variant-quickjs-singlefile-cjs-release-asyncify/src/ffi.ts
index 83989cf6d..e89c9b41c 100644
--- a/packages/variant-quickjs-singlefile-cjs-release-asyncify/src/ffi.ts
+++ b/packages/variant-quickjs-singlefile-cjs-release-asyncify/src/ffi.ts
@@ -23,6 +23,7 @@ import {
   EvalDetectModule,
   GetOwnPropertyNamesFlags,
   IsEqualOp,
+  HostRefId,
   JSPromiseStateEnum,
   assertSync,
 } from "@jitl/quickjs-ffi-types"
@@ -84,6 +85,18 @@ export class QuickJSAsyncFFI {
 
   QTS_GetTrue: () => JSValueConstPointer = this.module.cwrap("QTS_GetTrue", "number", [])
 
+  QTS_NewHostRef: (ctx: JSContextPointer, id: HostRefId) => JSValuePointer = this.module.cwrap(
+    "QTS_NewHostRef",
+    "number",
+    ["number", "number"],
+  )
+
+  QTS_GetHostRefId: (value: JSValuePointer | JSValueConstPointer) => HostRefId = this.module.cwrap(
+    "QTS_GetHostRefId",
+    "number",
+    ["number"],
+  )
+
   QTS_NewRuntime: () => JSRuntimePointer = this.module.cwrap("QTS_NewRuntime", "number", [])
 
   QTS_FreeRuntime: (rt: JSRuntimePointer) => void = this.module.cwrap("QTS_FreeRuntime", null, [
@@ -479,8 +492,19 @@ export class QuickJSAsyncFFI {
 
   QTS_BuildIsAsyncify: () => number = this.module.cwrap("QTS_BuildIsAsyncify", "number", [])
 
-  QTS_NewFunction: (ctx: JSContextPointer, func_id: number, name: string) => JSValuePointer =
-    this.module.cwrap("QTS_NewFunction", "number", ["number", "number", "string"])
+  QTS_NewFunction: (
+    ctx: JSContextPointer,
+    name: string,
+    arg_length: number,
+    is_constructor: boolean,
+    host_ref_id: HostRefId,
+  ) => JSValuePointer = this.module.cwrap("QTS_NewFunction", "number", [
+    "number",
+    "string",
+    "number",
+    "boolean",
+    "number",
+  ])
 
   QTS_ArgvGetJSValueConstPointer: (
     argv: JSValuePointer | JSValueConstPointer,
diff --git a/packages/variant-quickjs-singlefile-cjs-release-sync/src/ffi.ts b/packages/variant-quickjs-singlefile-cjs-release-sync/src/ffi.ts
index 419f408d7..17e6ccac9 100644
--- a/packages/variant-quickjs-singlefile-cjs-release-sync/src/ffi.ts
+++ b/packages/variant-quickjs-singlefile-cjs-release-sync/src/ffi.ts
@@ -23,6 +23,7 @@ import {
   EvalDetectModule,
   GetOwnPropertyNamesFlags,
   IsEqualOp,
+  HostRefId,
   JSPromiseStateEnum,
 } from "@jitl/quickjs-ffi-types"
 
@@ -83,6 +84,18 @@ export class QuickJSFFI {
 
   QTS_GetTrue: () => JSValueConstPointer = this.module.cwrap("QTS_GetTrue", "number", [])
 
+  QTS_NewHostRef: (ctx: JSContextPointer, id: HostRefId) => JSValuePointer = this.module.cwrap(
+    "QTS_NewHostRef",
+    "number",
+    ["number", "number"],
+  )
+
+  QTS_GetHostRefId: (value: JSValuePointer | JSValueConstPointer) => HostRefId = this.module.cwrap(
+    "QTS_GetHostRefId",
+    "number",
+    ["number"],
+  )
+
   QTS_NewRuntime: () => JSRuntimePointer = this.module.cwrap("QTS_NewRuntime", "number", [])
 
   QTS_FreeRuntime: (rt: JSRuntimePointer) => void = this.module.cwrap("QTS_FreeRuntime", null, [
@@ -375,8 +388,19 @@ export class QuickJSFFI {
 
   QTS_BuildIsAsyncify: () => number = this.module.cwrap("QTS_BuildIsAsyncify", "number", [])
 
-  QTS_NewFunction: (ctx: JSContextPointer, func_id: number, name: string) => JSValuePointer =
-    this.module.cwrap("QTS_NewFunction", "number", ["number", "number", "string"])
+  QTS_NewFunction: (
+    ctx: JSContextPointer,
+    name: string,
+    arg_length: number,
+    is_constructor: boolean,
+    host_ref_id: HostRefId,
+  ) => JSValuePointer = this.module.cwrap("QTS_NewFunction", "number", [
+    "number",
+    "string",
+    "number",
+    "boolean",
+    "number",
+  ])
 
   QTS_ArgvGetJSValueConstPointer: (
     argv: JSValuePointer | JSValueConstPointer,
diff --git a/packages/variant-quickjs-singlefile-mjs-debug-asyncify/src/ffi.ts b/packages/variant-quickjs-singlefile-mjs-debug-asyncify/src/ffi.ts
index ee3ce88b3..a154293f8 100644
--- a/packages/variant-quickjs-singlefile-mjs-debug-asyncify/src/ffi.ts
+++ b/packages/variant-quickjs-singlefile-mjs-debug-asyncify/src/ffi.ts
@@ -23,6 +23,7 @@ import {
   EvalDetectModule,
   GetOwnPropertyNamesFlags,
   IsEqualOp,
+  HostRefId,
   JSPromiseStateEnum,
   assertSync,
 } from "@jitl/quickjs-ffi-types"
@@ -84,6 +85,18 @@ export class QuickJSAsyncFFI {
 
   QTS_GetTrue: () => JSValueConstPointer = this.module.cwrap("QTS_GetTrue", "number", [])
 
+  QTS_NewHostRef: (ctx: JSContextPointer, id: HostRefId) => JSValuePointer = this.module.cwrap(
+    "QTS_NewHostRef",
+    "number",
+    ["number", "number"],
+  )
+
+  QTS_GetHostRefId: (value: JSValuePointer | JSValueConstPointer) => HostRefId = this.module.cwrap(
+    "QTS_GetHostRefId",
+    "number",
+    ["number"],
+  )
+
   QTS_NewRuntime: () => JSRuntimePointer = this.module.cwrap("QTS_NewRuntime", "number", [])
 
   QTS_FreeRuntime: (rt: JSRuntimePointer) => void = this.module.cwrap("QTS_FreeRuntime", null, [
@@ -482,8 +495,19 @@ export class QuickJSAsyncFFI {
 
   QTS_BuildIsAsyncify: () => number = this.module.cwrap("QTS_BuildIsAsyncify", "number", [])
 
-  QTS_NewFunction: (ctx: JSContextPointer, func_id: number, name: string) => JSValuePointer =
-    this.module.cwrap("QTS_NewFunction", "number", ["number", "number", "string"])
+  QTS_NewFunction: (
+    ctx: JSContextPointer,
+    name: string,
+    arg_length: number,
+    is_constructor: boolean,
+    host_ref_id: HostRefId,
+  ) => JSValuePointer = this.module.cwrap("QTS_NewFunction", "number", [
+    "number",
+    "string",
+    "number",
+    "boolean",
+    "number",
+  ])
 
   QTS_ArgvGetJSValueConstPointer: (
     argv: JSValuePointer | JSValueConstPointer,
diff --git a/packages/variant-quickjs-singlefile-mjs-debug-sync/src/ffi.ts b/packages/variant-quickjs-singlefile-mjs-debug-sync/src/ffi.ts
index 323a3abcf..6740134db 100644
--- a/packages/variant-quickjs-singlefile-mjs-debug-sync/src/ffi.ts
+++ b/packages/variant-quickjs-singlefile-mjs-debug-sync/src/ffi.ts
@@ -23,6 +23,7 @@ import {
   EvalDetectModule,
   GetOwnPropertyNamesFlags,
   IsEqualOp,
+  HostRefId,
   JSPromiseStateEnum,
 } from "@jitl/quickjs-ffi-types"
 
@@ -83,6 +84,18 @@ export class QuickJSFFI {
 
   QTS_GetTrue: () => JSValueConstPointer = this.module.cwrap("QTS_GetTrue", "number", [])
 
+  QTS_NewHostRef: (ctx: JSContextPointer, id: HostRefId) => JSValuePointer = this.module.cwrap(
+    "QTS_NewHostRef",
+    "number",
+    ["number", "number"],
+  )
+
+  QTS_GetHostRefId: (value: JSValuePointer | JSValueConstPointer) => HostRefId = this.module.cwrap(
+    "QTS_GetHostRefId",
+    "number",
+    ["number"],
+  )
+
   QTS_NewRuntime: () => JSRuntimePointer = this.module.cwrap("QTS_NewRuntime", "number", [])
 
   QTS_FreeRuntime: (rt: JSRuntimePointer) => void = this.module.cwrap("QTS_FreeRuntime", null, [
@@ -375,8 +388,19 @@ export class QuickJSFFI {
 
   QTS_BuildIsAsyncify: () => number = this.module.cwrap("QTS_BuildIsAsyncify", "number", [])
 
-  QTS_NewFunction: (ctx: JSContextPointer, func_id: number, name: string) => JSValuePointer =
-    this.module.cwrap("QTS_NewFunction", "number", ["number", "number", "string"])
+  QTS_NewFunction: (
+    ctx: JSContextPointer,
+    name: string,
+    arg_length: number,
+    is_constructor: boolean,
+    host_ref_id: HostRefId,
+  ) => JSValuePointer = this.module.cwrap("QTS_NewFunction", "number", [
+    "number",
+    "string",
+    "number",
+    "boolean",
+    "number",
+  ])
 
   QTS_ArgvGetJSValueConstPointer: (
     argv: JSValuePointer | JSValueConstPointer,
diff --git a/packages/variant-quickjs-singlefile-mjs-release-asyncify/src/ffi.ts b/packages/variant-quickjs-singlefile-mjs-release-asyncify/src/ffi.ts
index 83989cf6d..e89c9b41c 100644
--- a/packages/variant-quickjs-singlefile-mjs-release-asyncify/src/ffi.ts
+++ b/packages/variant-quickjs-singlefile-mjs-release-asyncify/src/ffi.ts
@@ -23,6 +23,7 @@ import {
   EvalDetectModule,
   GetOwnPropertyNamesFlags,
   IsEqualOp,
+  HostRefId,
   JSPromiseStateEnum,
   assertSync,
 } from "@jitl/quickjs-ffi-types"
@@ -84,6 +85,18 @@ export class QuickJSAsyncFFI {
 
   QTS_GetTrue: () => JSValueConstPointer = this.module.cwrap("QTS_GetTrue", "number", [])
 
+  QTS_NewHostRef: (ctx: JSContextPointer, id: HostRefId) => JSValuePointer = this.module.cwrap(
+    "QTS_NewHostRef",
+    "number",
+    ["number", "number"],
+  )
+
+  QTS_GetHostRefId: (value: JSValuePointer | JSValueConstPointer) => HostRefId = this.module.cwrap(
+    "QTS_GetHostRefId",
+    "number",
+    ["number"],
+  )
+
   QTS_NewRuntime: () => JSRuntimePointer = this.module.cwrap("QTS_NewRuntime", "number", [])
 
   QTS_FreeRuntime: (rt: JSRuntimePointer) => void = this.module.cwrap("QTS_FreeRuntime", null, [
@@ -479,8 +492,19 @@ export class QuickJSAsyncFFI {
 
   QTS_BuildIsAsyncify: () => number = this.module.cwrap("QTS_BuildIsAsyncify", "number", [])
 
-  QTS_NewFunction: (ctx: JSContextPointer, func_id: number, name: string) => JSValuePointer =
-    this.module.cwrap("QTS_NewFunction", "number", ["number", "number", "string"])
+  QTS_NewFunction: (
+    ctx: JSContextPointer,
+    name: string,
+    arg_length: number,
+    is_constructor: boolean,
+    host_ref_id: HostRefId,
+  ) => JSValuePointer = this.module.cwrap("QTS_NewFunction", "number", [
+    "number",
+    "string",
+    "number",
+    "boolean",
+    "number",
+  ])
 
   QTS_ArgvGetJSValueConstPointer: (
     argv: JSValuePointer | JSValueConstPointer,
diff --git a/packages/variant-quickjs-singlefile-mjs-release-sync/src/ffi.ts b/packages/variant-quickjs-singlefile-mjs-release-sync/src/ffi.ts
index 419f408d7..17e6ccac9 100644
--- a/packages/variant-quickjs-singlefile-mjs-release-sync/src/ffi.ts
+++ b/packages/variant-quickjs-singlefile-mjs-release-sync/src/ffi.ts
@@ -23,6 +23,7 @@ import {
   EvalDetectModule,
   GetOwnPropertyNamesFlags,
   IsEqualOp,
+  HostRefId,
   JSPromiseStateEnum,
 } from "@jitl/quickjs-ffi-types"
 
@@ -83,6 +84,18 @@ export class QuickJSFFI {
 
   QTS_GetTrue: () => JSValueConstPointer = this.module.cwrap("QTS_GetTrue", "number", [])
 
+  QTS_NewHostRef: (ctx: JSContextPointer, id: HostRefId) => JSValuePointer = this.module.cwrap(
+    "QTS_NewHostRef",
+    "number",
+    ["number", "number"],
+  )
+
+  QTS_GetHostRefId: (value: JSValuePointer | JSValueConstPointer) => HostRefId = this.module.cwrap(
+    "QTS_GetHostRefId",
+    "number",
+    ["number"],
+  )
+
   QTS_NewRuntime: () => JSRuntimePointer = this.module.cwrap("QTS_NewRuntime", "number", [])
 
   QTS_FreeRuntime: (rt: JSRuntimePointer) => void = this.module.cwrap("QTS_FreeRuntime", null, [
@@ -375,8 +388,19 @@ export class QuickJSFFI {
 
   QTS_BuildIsAsyncify: () => number = this.module.cwrap("QTS_BuildIsAsyncify", "number", [])
 
-  QTS_NewFunction: (ctx: JSContextPointer, func_id: number, name: string) => JSValuePointer =
-    this.module.cwrap("QTS_NewFunction", "number", ["number", "number", "string"])
+  QTS_NewFunction: (
+    ctx: JSContextPointer,
+    name: string,
+    arg_length: number,
+    is_constructor: boolean,
+    host_ref_id: HostRefId,
+  ) => JSValuePointer = this.module.cwrap("QTS_NewFunction", "number", [
+    "number",
+    "string",
+    "number",
+    "boolean",
+    "number",
+  ])
 
   QTS_ArgvGetJSValueConstPointer: (
     argv: JSValuePointer | JSValueConstPointer,
diff --git a/packages/variant-quickjs-wasmfile-debug-asyncify/src/ffi.ts b/packages/variant-quickjs-wasmfile-debug-asyncify/src/ffi.ts
index ee3ce88b3..a154293f8 100644
--- a/packages/variant-quickjs-wasmfile-debug-asyncify/src/ffi.ts
+++ b/packages/variant-quickjs-wasmfile-debug-asyncify/src/ffi.ts
@@ -23,6 +23,7 @@ import {
   EvalDetectModule,
   GetOwnPropertyNamesFlags,
   IsEqualOp,
+  HostRefId,
   JSPromiseStateEnum,
   assertSync,
 } from "@jitl/quickjs-ffi-types"
@@ -84,6 +85,18 @@ export class QuickJSAsyncFFI {
 
   QTS_GetTrue: () => JSValueConstPointer = this.module.cwrap("QTS_GetTrue", "number", [])
 
+  QTS_NewHostRef: (ctx: JSContextPointer, id: HostRefId) => JSValuePointer = this.module.cwrap(
+    "QTS_NewHostRef",
+    "number",
+    ["number", "number"],
+  )
+
+  QTS_GetHostRefId: (value: JSValuePointer | JSValueConstPointer) => HostRefId = this.module.cwrap(
+    "QTS_GetHostRefId",
+    "number",
+    ["number"],
+  )
+
   QTS_NewRuntime: () => JSRuntimePointer = this.module.cwrap("QTS_NewRuntime", "number", [])
 
   QTS_FreeRuntime: (rt: JSRuntimePointer) => void = this.module.cwrap("QTS_FreeRuntime", null, [
@@ -482,8 +495,19 @@ export class QuickJSAsyncFFI {
 
   QTS_BuildIsAsyncify: () => number = this.module.cwrap("QTS_BuildIsAsyncify", "number", [])
 
-  QTS_NewFunction: (ctx: JSContextPointer, func_id: number, name: string) => JSValuePointer =
-    this.module.cwrap("QTS_NewFunction", "number", ["number", "number", "string"])
+  QTS_NewFunction: (
+    ctx: JSContextPointer,
+    name: string,
+    arg_length: number,
+    is_constructor: boolean,
+    host_ref_id: HostRefId,
+  ) => JSValuePointer = this.module.cwrap("QTS_NewFunction", "number", [
+    "number",
+    "string",
+    "number",
+    "boolean",
+    "number",
+  ])
 
   QTS_ArgvGetJSValueConstPointer: (
     argv: JSValuePointer | JSValueConstPointer,
diff --git a/packages/variant-quickjs-wasmfile-debug-sync/src/ffi.ts b/packages/variant-quickjs-wasmfile-debug-sync/src/ffi.ts
index 323a3abcf..6740134db 100644
--- a/packages/variant-quickjs-wasmfile-debug-sync/src/ffi.ts
+++ b/packages/variant-quickjs-wasmfile-debug-sync/src/ffi.ts
@@ -23,6 +23,7 @@ import {
   EvalDetectModule,
   GetOwnPropertyNamesFlags,
   IsEqualOp,
+  HostRefId,
   JSPromiseStateEnum,
 } from "@jitl/quickjs-ffi-types"
 
@@ -83,6 +84,18 @@ export class QuickJSFFI {
 
   QTS_GetTrue: () => JSValueConstPointer = this.module.cwrap("QTS_GetTrue", "number", [])
 
+  QTS_NewHostRef: (ctx: JSContextPointer, id: HostRefId) => JSValuePointer = this.module.cwrap(
+    "QTS_NewHostRef",
+    "number",
+    ["number", "number"],
+  )
+
+  QTS_GetHostRefId: (value: JSValuePointer | JSValueConstPointer) => HostRefId = this.module.cwrap(
+    "QTS_GetHostRefId",
+    "number",
+    ["number"],
+  )
+
   QTS_NewRuntime: () => JSRuntimePointer = this.module.cwrap("QTS_NewRuntime", "number", [])
 
   QTS_FreeRuntime: (rt: JSRuntimePointer) => void = this.module.cwrap("QTS_FreeRuntime", null, [
@@ -375,8 +388,19 @@ export class QuickJSFFI {
 
   QTS_BuildIsAsyncify: () => number = this.module.cwrap("QTS_BuildIsAsyncify", "number", [])
 
-  QTS_NewFunction: (ctx: JSContextPointer, func_id: number, name: string) => JSValuePointer =
-    this.module.cwrap("QTS_NewFunction", "number", ["number", "number", "string"])
+  QTS_NewFunction: (
+    ctx: JSContextPointer,
+    name: string,
+    arg_length: number,
+    is_constructor: boolean,
+    host_ref_id: HostRefId,
+  ) => JSValuePointer = this.module.cwrap("QTS_NewFunction", "number", [
+    "number",
+    "string",
+    "number",
+    "boolean",
+    "number",
+  ])
 
   QTS_ArgvGetJSValueConstPointer: (
     argv: JSValuePointer | JSValueConstPointer,
diff --git a/packages/variant-quickjs-wasmfile-release-asyncify/src/ffi.ts b/packages/variant-quickjs-wasmfile-release-asyncify/src/ffi.ts
index 83989cf6d..e89c9b41c 100644
--- a/packages/variant-quickjs-wasmfile-release-asyncify/src/ffi.ts
+++ b/packages/variant-quickjs-wasmfile-release-asyncify/src/ffi.ts
@@ -23,6 +23,7 @@ import {
   EvalDetectModule,
   GetOwnPropertyNamesFlags,
   IsEqualOp,
+  HostRefId,
   JSPromiseStateEnum,
   assertSync,
 } from "@jitl/quickjs-ffi-types"
@@ -84,6 +85,18 @@ export class QuickJSAsyncFFI {
 
   QTS_GetTrue: () => JSValueConstPointer = this.module.cwrap("QTS_GetTrue", "number", [])
 
+  QTS_NewHostRef: (ctx: JSContextPointer, id: HostRefId) => JSValuePointer = this.module.cwrap(
+    "QTS_NewHostRef",
+    "number",
+    ["number", "number"],
+  )
+
+  QTS_GetHostRefId: (value: JSValuePointer | JSValueConstPointer) => HostRefId = this.module.cwrap(
+    "QTS_GetHostRefId",
+    "number",
+    ["number"],
+  )
+
   QTS_NewRuntime: () => JSRuntimePointer = this.module.cwrap("QTS_NewRuntime", "number", [])
 
   QTS_FreeRuntime: (rt: JSRuntimePointer) => void = this.module.cwrap("QTS_FreeRuntime", null, [
@@ -479,8 +492,19 @@ export class QuickJSAsyncFFI {
 
   QTS_BuildIsAsyncify: () => number = this.module.cwrap("QTS_BuildIsAsyncify", "number", [])
 
-  QTS_NewFunction: (ctx: JSContextPointer, func_id: number, name: string) => JSValuePointer =
-    this.module.cwrap("QTS_NewFunction", "number", ["number", "number", "string"])
+  QTS_NewFunction: (
+    ctx: JSContextPointer,
+    name: string,
+    arg_length: number,
+    is_constructor: boolean,
+    host_ref_id: HostRefId,
+  ) => JSValuePointer = this.module.cwrap("QTS_NewFunction", "number", [
+    "number",
+    "string",
+    "number",
+    "boolean",
+    "number",
+  ])
 
   QTS_ArgvGetJSValueConstPointer: (
     argv: JSValuePointer | JSValueConstPointer,
diff --git a/packages/variant-quickjs-wasmfile-release-sync/src/ffi.ts b/packages/variant-quickjs-wasmfile-release-sync/src/ffi.ts
index 419f408d7..17e6ccac9 100644
--- a/packages/variant-quickjs-wasmfile-release-sync/src/ffi.ts
+++ b/packages/variant-quickjs-wasmfile-release-sync/src/ffi.ts
@@ -23,6 +23,7 @@ import {
   EvalDetectModule,
   GetOwnPropertyNamesFlags,
   IsEqualOp,
+  HostRefId,
   JSPromiseStateEnum,
 } from "@jitl/quickjs-ffi-types"
 
@@ -83,6 +84,18 @@ export class QuickJSFFI {
 
   QTS_GetTrue: () => JSValueConstPointer = this.module.cwrap("QTS_GetTrue", "number", [])
 
+  QTS_NewHostRef: (ctx: JSContextPointer, id: HostRefId) => JSValuePointer = this.module.cwrap(
+    "QTS_NewHostRef",
+    "number",
+    ["number", "number"],
+  )
+
+  QTS_GetHostRefId: (value: JSValuePointer | JSValueConstPointer) => HostRefId = this.module.cwrap(
+    "QTS_GetHostRefId",
+    "number",
+    ["number"],
+  )
+
   QTS_NewRuntime: () => JSRuntimePointer = this.module.cwrap("QTS_NewRuntime", "number", [])
 
   QTS_FreeRuntime: (rt: JSRuntimePointer) => void = this.module.cwrap("QTS_FreeRuntime", null, [
@@ -375,8 +388,19 @@ export class QuickJSFFI {
 
   QTS_BuildIsAsyncify: () => number = this.module.cwrap("QTS_BuildIsAsyncify", "number", [])
 
-  QTS_NewFunction: (ctx: JSContextPointer, func_id: number, name: string) => JSValuePointer =
-    this.module.cwrap("QTS_NewFunction", "number", ["number", "number", "string"])
+  QTS_NewFunction: (
+    ctx: JSContextPointer,
+    name: string,
+    arg_length: number,
+    is_constructor: boolean,
+    host_ref_id: HostRefId,
+  ) => JSValuePointer = this.module.cwrap("QTS_NewFunction", "number", [
+    "number",
+    "string",
+    "number",
+    "boolean",
+    "number",
+  ])
 
   QTS_ArgvGetJSValueConstPointer: (
     argv: JSValuePointer | JSValueConstPointer,