tsconfig.json

{
    "compilerOptions": {
        "outDir": "lib",
        "target": "ES2015" /* Specify ECMAScript target version: 'ES3' (default), 'ES5', 'ES2015', 'ES2016', 'ES2017', 'ES2018', 'ES2019', 'ES2020', or 'ESNEXT'. */,
        "moduleResolution": "node" /* Specify module resolution strategy: 'node' (Node.js) or 'classic' (TypeScript pre-1.6). */ /* Type declaration files to be included in compilation. */,
        "isolatedModules": true /* Transpile each file as a separate module (similar to 'ts.transpileModule'). */,
        "esModuleInterop": true /* Enables emit interoperability between CommonJS and ES Modules via creation of namespace objects for all imports. Implies 'allowSyntheticDefaultImports'. */,
        "strict": true /* Enable all strict type-checking options. */,
        "skipLibCheck": true /* Skip type checking of declaration files. */,
        "forceConsistentCasingInFileNames": true /* Disallow inconsistently-cased references to the same file. */,
        "allowJs": true /* Allow javascript files to be compiled. Useful when migrating JS to TS */,
        "checkJs": false /* Report errors in .js files. Works in tandem with allowJs. */,
        // Ensure that .d.ts files are created by tsc, but not .js files
        "declaration": true,
        "sourceMap": true
    },
    "include": ["src/**/*", "onServer/**/*"],
    "exclude": ["node_modules"] // *** The files to not type check ***
}