tsconfig.dev.json

{
  "compileOnSave": true,
  "compilerOptions": {
    "allowSyntheticDefaultImports": true,
    "alwaysStrict": true,
    "baseUrl": "./src",
    "checkJs": false,
    "downlevelIteration": true,
    "esModuleInterop": true,
    "jsx": "react",
    "lib": ["dom", "es2015", "es2016", "es2017"],
    "moduleResolution": "node",
    "noImplicitAny": true,
    "noImplicitReturns": true,
    "noImplicitThis": true,
    "noUnusedLocals": true,
    "outDir": "./dist",
    "plugins": [],
    "preserveConstEnums": true,
    "removeComments": true,
    "resolveJsonModule": true,
    "skipLibCheck": true,
    "sourceMap": true,
    "strict": true,
    "strictNullChecks": true,
    "target": "es5"
  },
  "typeRoots": ["src", "node_modules/@types"],
  "include": ["src"],
  "exclude": ["node_modules"]
}