JavaScript Built-in Types List

The `js-types` package provides a comprehensive, programmatically accessible list of built-in JavaScript data types, primarily sourced from MDN Web Docs. It is currently at stable version 4.0.0, which requires Node.js 18.20 and is a pure ESM package. The package maintains a moderate release cadence, with major versions often coinciding with significant Node.js LTS updates and new ECMAScript feature adoptions. Its key differentiator lies in its straightforward design: the core data is simply a `js-types.json` file that can be directly imported, making it highly portable and easy to integrate across various JavaScript environments—from Node.js backend services to browser-side applications—without introducing complex dependencies. This makes it an ideal utility for tasks like runtime type checking, generating documentation, or any scenario requiring a definitive, up-to-date enumeration of JavaScript's fundamental types.