tsconfig.json

{
  "compilerOptions": {
    "target": "ES2017" /* 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",
      "dom"
    ] /* Specify library files to be included in the compilation. */,
    "outDir": "target/src" /* Redirect output structure to the directory. */,
    "rootDir": "src" /* Specify the root directory of input files. Use to control the output directory structure with --outDir. */,
    "strict": true /* Enable all strict type-checking options. */,
    "typeRoots": [
      "node_modules/@types",
      "types"
    ] /* List of folders to include type definitions from. */,
    "esModuleInterop": true /* Enables emit interoperability between CommonJS and ES Modules via creation of namespace objects for all imports. Implies 'allowSyntheticDefaultImports'. */,
    "resolveJsonModule": true /* Include modules imported with '.json' extension */
  },
  "exclude": [
    "node_modules"
  ]
}