tsconfig.json

{
  "compilerOptions": {
    /* Basic Options */
    // "incremental": true,                   /* Enable incremental compilation */
    "target": "ESNEXT", /* Specify ECMAScript target version: 'ES3' (default), 'ES5', 'ES2015', 'ES2016', 'ES2017', 'ES2018', 'ES2019' or 'ESNEXT'. */
    "module": "es2015", 
    // "module": "commonjs",
    /* Specify module code generation: 'none', 'commonjs', 'amd', 'system', 'umd', 'es2015', or 'ESNext'. */
    "lib": [
      "DOM",
      "ES2015",
      "ES2016",
      "ES2017",
      "ES2018",
      "ES2021.WeakRef"
    ], 
    "outDir": "./dist",                        /* Redirect output structure to the directory. */
    "rootDir": "./src",                       /* Specify the root directory of input files. Use to control the output directory structure with 
    /* Strict Type-Checking Options */
    "strict": true, /* Enable all strict type-checking options. */
    "esModuleInterop": true, /* Enables emit interoperability between CommonJS and ES Modules via creation of namespace objects for all imports. Implies 'allowSyntheticDefaultImports'. */
    "skipLibCheck": true
  },
  "include": [
    "./src"
, "test/__test.ts"  ]
 
}