tsconfig.json

{
    "compilerOptions": {
      "target": "es6" /* Specify ECMAScript target version: 'ES3' (default), 'ES5', 'ES2015', 'ES2016', 'ES2017', 'ES2018', 'ES2019' or 'ESNEXT'. */,
      "module": "commonjs" /* Specify module code generation: 'none', 'commonjs', 'amd', 'system', 'umd', 'es2015', or 'ESNext'. */,
      "lib": ["es2015"] /* Specify library files to be included in the compilation. */,
      // "allowJs": true,                       /* Allow javascript files to be compiled. */
      // "checkJs": true,                       /* Report errors in .js files. */
      "sourceMap": true /* Generates corresponding '.map' file. */,
      // "outFile": "./",                       /* Concatenate and emit output to single file. */
      "outDir": "./dist" /* Redirect output structure to the directory. */,
      /* Strict Type-Checking Options */
      "strict": true /* Enable all strict type-checking options. */,
      /* Additional Checks */
      "noUnusedLocals": true,                /* Report errors on unused locals. */
      "noUnusedParameters": true,            /* Report errors on unused parameters. */
      /* Module Resolution Options */
      "moduleResolution": "node" /* Specify module resolution strategy: 'node' (Node.js) or 'classic' (TypeScript pre-1.6). */,
      "baseUrl": "./src" /* Base directory to resolve non-absolute module names. */,
      "typeRoots": ["node_modules/@types", "types"] /* List of folders to include type definitions from. */,
      "esModuleInterop": true /* Enables emit interoperability between CommonJS and ES Modules via creation of namespace objects for all imports. Implies 'allowSyntheticDefaultImports'. */,
      "resolveJsonModule": true
    },
    "include": ["src/**/*"],
    "exclude": ["node_modules"]
  }