tsconfig.json

{
  "compilerOptions": {
    /* Basic Options */
    "target": "ES2016", /* Specify ECMAScript target version: 'ES3' (default), 'ES5', 'ES2015', 'ES2016', 'ES2017', or 'ESNEXT'. */
    "module": "ESNext",
    "lib": [
      "dom",
      "DOM.Iterable",
      "esnext"
    ],
    /* Specify library files to be included in the compilation:  */
    "declaration": true, /* Generates corresponding '.d.ts' file. */
    "declarationDir": "dist/types",
    "outDir": "dist/modules", /* Redirect output structure to the directory. */
    "importHelpers": false, /* Import emit helpers from 'tslib'. */
    /* Strict Type-Checking Options */
    "strict": true, /* Enable all strict type-checking options. */
    /* Module Resolution Options */
    "moduleResolution": "node", /* Specify module resolution strategy: 'node' (Node.js) or 'classic' (TypeScript pre-1.6). */
    "allowSyntheticDefaultImports": true /* Allow default imports from modules with no default export. This does not affect code emit, just typechecking. */
    /* Experimental Options */
    // "experimentalDecorators": true,        /* Enables experimental support for ES7 decorators. */
    // "emitDecoratorMetadata": true,         /* Enables experimental support for emitting type metadata for decorators. */
  },
  "include": [
    "src/**/*.ts"
  ]
}