tsconfig.json

{
    "compilerOptions": {
        /* Basic Options */
        "target": "es6" /* 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'. */,
        "lib": [
            "dom",
            "es6",
            "dom.iterable",
            "scripthost"
        ] /* Specify library files to be included in the compilation. */,

        "sourceMap": true /* Generates corresponding '.map' file. */,
        "outDir": "./dist" /* Redirect output structure to the directory. */,
        "removeComments": true /* Do not emit comments to output. */,
        "noEmitOnError": true,

        /* 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. */,
        "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'. */
        /* Experimental Options */
        // "experimentalDecorators": true,        /* Enables experimental support for ES7 decorators. */
        // "emitDecoratorMetadata": true,         /* Enables experimental support for emitting type metadata for decorators. */
    },
    "exclude": [
        "node_modules" // would be the default
    ]
}