A browser-compatibility reference that shows which HTML, CSS, JavaScript, and web platform features are supported across modern browsers.

The formal specification defining the ECMAScript programming language, including JavaScript's syntax, semantics, built-in objects, execution model, and language behavior.

Documentation and guides for ESLint, a JavaScript and TypeScript linting tool used to identify problematic patterns, enforce coding conventions, and improve code quality.

Practical guides and documentation from Google covering modern web development, including HTML, CSS, JavaScript, performance, accessibility, and best practices for building websites.