MDNs

MDNs, short for Mozilla Developer Network, is a comprehensive, collaboratively authored resource for web developers. It provides documentation, references, and learning materials for web standards, browser APIs, and related technologies. The site aims to be a central, authoritative reference for HTML, CSS, JavaScript, the DOM, HTTP, accessibility, performance, graphics, and other areas of modern web development.

MDN began as part of the Mozilla project to document web technologies and to support developers building for the open web. It operates with a wiki-like model that invites contributions from Mozilla staff, engineers, educators, and the wider web community. Updates and changes are tracked, and pages often include versioned compatibility data for web APIs.

Contents include API references with examples, tutorials and guides, glossary, and interactive demonstrations or live code samples. It also provides cross-browser compatibility information and notes on compatibility across major engines.

Access is free and open, with content published under an open license that allows reuse with attribution. Anyone can propose edits or additions via the platform’s editing workflow; changes undergo review before publication.

MDN Web Docs is the primary delivery of the MDN project, available at developer.mozilla.org. It is widely used by developers, educators, and students as a reliable starting point for learning and mastering web technologies.