tsconfig-prod.json

{
    "compilerOptions": {
        "outDir": "dist/",        // path to output directory
        "sourceMap": true,          // allow sourcemap support
        "declaration": true,                   /* Generates corresponding '.d.ts' file. */
        "strictNullChecks": true,   // enable strict null checks as a best practice
        "esModuleInterop": true, /* Enables emit interoperability between CommonJS and ES Modules via creation of namespace objects for all imports. Implies 'allowSyntheticDefaultImports'. */
        "target":
            "ES2015" /* Specify ECMAScript target version: 'ES3' (default), 'ES5', 'ES2015', 'ES2016', 'ES2017','ES2018' or 'ESNEXT'. */,
        "module":
            "commonjs" /* Specify module code generation: 'none', 'commonjs', 'amd', 'system', 'umd', 'es2015', or 'ESNext'. */,
        "jsx": "react",             // use typescript to transpile jsx to js
        "allowJs": false             // allow a partial TypeScript and JavaScript codebase

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