tsconfig.client.json

{
  "compilerOptions": {
    /* Basic Options */
    "target": "ES2015",                       /* Specify ECMAScript target version: 'ES3' (default), 'ES5', 'ES2015', 'ES2016', 'ES2017','ES2018' or 'ESNEXT'. */
    "module": "ESNext",
    "moduleResolution": "node",
    "outDir": "./built/client/",              /* Redirect output structure to the directory. */
    "rootDir": "./src/",                      /* Specify the root directory of input files. Use to control the output directory structure with --outDir. */
    "removeComments": false,

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

    /* Additional Checks */
    "noImplicitReturns": true,                /* Report error when not all code paths in function return a value. */

    /* Module Resolution Options */
    "esModuleInterop": true,                  /* Enables emit interoperability between CommonJS and ES Modules via creation of namespace objects for all imports. Implies 'allowSyntheticDefaultImports'. */

    "experimentalDecorators": true,
  },
  "include": [
    "src/**/*",
  ],
  "exclude": [
      "node_modules",
      "test/**/*.ts",
  ]
}