tsconfig.json

{
  "compilerOptions": {
    "declaration": true,
    "lib": ["es2015", "dom"],
    // Target latest version of ECMAScript.
    "target": "esnext",
    // Specify module code generation: 'none', 'commonjs', 'amd', 'system', 'umd', 'es2015', or 'ESNext'.
    "module": "esnext",
    // Search under node_modules for non-relative imports.
    "moduleResolution": "node",
    // Enable strictest settings like strictNullChecks & noImplicitAny.
    "strict": true,
    "strictPropertyInitialization": false,
    // Allow default imports from modules with no default export. This does not affect code emit, just typechecking.
    "allowSyntheticDefaultImports": true,
    // Enables emit interoperability between CommonJS and ES Modules via creation of namespace objects for all imports. Implies 'allowSyntheticDefaultImports'.
    "esModuleInterop": true,
    // Specify JSX code generation: 'preserve', 'react-native', or 'react'.
    "jsx": "preserve",
    // Import emit helpers (e.g. __extends, __rest, etc..) from tslib
    "importHelpers": true,
    // Enables experimental support for ES7 decorators.
    "experimentalDecorators": true,
    "emitDecoratorMetadata": true,
    // Generates corresponding .map file.
    "sourceMap": true,
    // Disallow inconsistently-cased references to the same file.
    "forceConsistentCasingInFileNames": true,
    // Allow json import
    "resolveJsonModule": true,
    // skip type checking of declaration files
    "skipLibCheck": true,
    "baseUrl": "./",
  },
  "exclude": ["**/test", "**/lib", "**/es", "node_modules"]
}