tsconfig.json

{
  "compilerOptions": {
    "allowSyntheticDefaultImports": true,
    "declaration": true, // Automatically generates .d.ts files
    // "declarationDir": "./dist/types",
    "emitDeclarationOnly": false,
    "outDir": "dist/esm",
    "target": "es2020", /* Set the JavaScript language version for emitted JavaScript and include compatible library declarations. */
    "module": "ES2020", /* Specify what module code is generated. */
    "moduleResolution": "node", /* Specify how TypeScript looks up a file from a given module specifier. */ /* Specify a file that bundles all outputs into one JavaScript file. If 'declaration' is true, also designates a file that bundles all .d.ts output. */
    "esModuleInterop": true, /* Emit additional JavaScript to ease support for importing CommonJS modules. This enables 'allowSyntheticDefaultImports' for type compatibility. */
    "forceConsistentCasingInFileNames": true, /* Ensure that casing is correct in imports. */
    /* Type Checking */
    "strict": true, /* Enable all strict type-checking options. */
    "skipLibCheck": true, /* Skip type checking all .d.ts files. */
    "baseUrl": ".",
    "allowJs": true,
    "isolatedModules": true,
    "noEmit": false,
    // "noEmit": true,
    "resolveJsonModule": true,
    "types": [
      "jest",
      "node"
    ],
    "lib": [
      "es5",
      "es2015",
      "es2016",
      "dom",
      "dom.iterable",
      "ESNext"
    ],
  },
  "include": [
    "src/**/*.ts"
  ],
  "exclude": [
    "src/**/*.test.ts",
    "src/**/*.spec.ts",
    "**/__tests__/**"
  ],
}