tsconfig.json

{
    "include": ["src"],
    "exclude": ["src/**.test.ts"],
    "compilerOptions": {
        /* Basic Options */
        "target": "esnext", /* Specify ECMAScript target version: 'ES3' (default), 'ES5', 'ES2015', 'ES2016', 'ES2017','ES2018' or 'ESNEXT'. */
        "module": "es2015", /* Specify module code generation: 'none', 'commonjs', 'amd', 'system', 'umd', 'es2015', or 'ESNext'. */
        "declaration": true, /* Generates corresponding '.d.ts' file. */
        "strict": true, /* Enable all strict type-checking options. */
        "outDir": "dist",
        "allowSyntheticDefaultImports": true, /* Allow default imports from modules with no default export. This does not affect code emit, just typechecking. */
        "esModuleInterop": true, /* Enables emit interoperability between CommonJS and ES Modules via creation of namespace objects for all imports. Implies 'allowSyntheticDefaultImports'. */
        // "noImplicitAny": false
        "lib": [
            "dom",
            "es2017",
        ],
    }
}