tsconfig.json

{
    "compilerOptions": {
        /* Basic Options */
        "target": "es2019" /* 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": [
            "es6",
            "es2019",
            "dom"
        ] /* Specify library files to be included in the compilation. */,
        "allowJs": true /* Allow javascript files to be compiled. */,
        "noEmit": true /* Do not emit outputs. */,
        //"isolatedModules": false, //there were errors when using true.
        "isolatedModules": true /* Transpile each file as a separate module (similar to 'ts.transpileModule'). */,
        "strict": true /* Enable all strict type-checking options. */,
        "moduleResolution": "node" /* Specify module resolution strategy: 'node' (Node.js) or 'classic' (TypeScript pre-1.6). */,
        "baseUrl": "./" /* Base directory to resolve non-absolute module names. */,
        "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'. */,
        "experimentalDecorators": true /* Enables experimental support for ES7 decorators. */,
        "resolveJsonModule": true,
        "typeRoots": [
            "src/@types",
            "./node_modules/@types"
        ]
    },
    "exclude": [
        "node_modules"
    ]
}