tsconfig.json

{
  "compilerOptions": {
    "target": "ES2020", /* Specify ECMAScript target version: 'ES3' (default), 'ES5', 'ES2015', 'ES2016', 'ES2017', 'ES2018', 'ES2019', 'ES2020', or 'ESNEXT'. */
    "lib": [
      "ES2020",
    ],
    "module": "commonjs", /* Specify module code generation: 'none', 'commonjs', 'amd', 'system', 'umd', 'es2015', 'es2020', or 'ESNext'. */
    "allowJs": true, /* Allow javascript files to be compiled. */
    "checkJs": true, /* Report errors in .js files. */
    "outDir": "lib", /* Redirect output structure to the directory. */
    "rootDir": "src", /* Specify the root directory of input files. Use to control the output directory structure with --outDir. */
    "baseUrl": "./src",
    /* Strict Type-Checking Options */
    "strict": true, /* Enable all strict type-checking options. */
    "noImplicitAny": true, /* Raise error on expressions and declarations with an implied 'any' type. */
    "strictNullChecks": true, /* Enable strict null checks. */
    "strictFunctionTypes": true, /* Enable strict checking of function types. */
    "strictBindCallApply": true, /* Enable strict 'bind', 'call', and 'apply' methods on functions. */
    "strictPropertyInitialization": true, /* Enable strict checking of property initialization in classes. */
    "noImplicitThis": true, /* Raise error on 'this' expressions with an implied 'any' type. */
    "alwaysStrict": true, /* Parse in strict mode and emit "use strict" for each source file. */
    "esModuleInterop": true, /* Enables emit interoperability between CommonJS and ES Modules via creation of namespace objects for all imports. Implies 'allowSyntheticDefaultImports'. */
    /* Advanced Options */
    "skipLibCheck": true,
    "downlevelIteration": true,
    "resolveJsonModule": true, /* Include modules imported with '.json' extension */
    "forceConsistentCasingInFileNames": true /* Disallow inconsistently-cased references to the same file. */
  },
  "exclude": [
    "lib",
    "package",
  ]
}