tsconfig.json

{
  "compilerOptions": {
    /* Basic Options */
    "target": "es5",                          /* Specify ECMAScript target version: 'ES3' (default), 'ES5', 'ES2015', 'ES2016', 'ES2017', 'ES2018', 'ES2019', 'ES2020', or 'ESNEXT'. */
    "module": "commonjs",                     /* Specify module code generation: 'none', 'commonjs', 'amd', 'system', 'umd', 'es2015', 'es2020', or 'ESNext'. */
    "allowJs": true,                          /* Allow javascript files to be compiled. */
    "outDir": "dist",                         /* Outputs to a "dist" folder */
    "rootDirs": [                             /* Specify where the code is */
      "app"
    ],

    /* Strict Type-Checking Options */
    "strict": true,                           /* Enable all strict type-checking options. */

    /* Additional Checks */
    /* You can enable this to remind yourself of good coding practices */
    // "noUnusedLocals": true,                  /* Report errors on unused locals. */
    // "noUnusedParameters": true,              /* Report errors on unused parameters. */
    // "noImplicitReturns": true,               /* Report error when not all code paths in function return a value. */
    // "noFallthroughCasesInSwitch": true,      /* Report errors for fallthrough cases in switch statement. */

    /* Module Resolution Options */
    "esModuleInterop": true,                  /* Enables emit interoperability between CommonJS and ES Modules via creation of namespace objects for all imports. Implies 'allowSyntheticDefaultImports'. */
    
    /* Advanced Options */
    "forceConsistentCasingInFileNames": true  /* Disallow inconsistently-cased references to the same file. */
  }
}