Welcome to MDN Web Docs

MDN Web Docs is an open-source, collaborative project that documents web technologies including CSS, HTML, JavaScript, and Web APIs. Alongside detailed reference documentation, we provide extensive learning resources for students and beginners getting started with web development.

MDN's mission

MDN's mission is to provide a blueprint for a better internet and empower a new generation of developers and content creators to build it.

The strength of MDN Web Docs lies in its vast community of active readers and contributors. Since 2005, approximately 45,000 contributors have created the documentation we know and love. Together, contributors have created over 45,000 documents that make up an up-to-date, comprehensive, and free resource for web developers worldwide.

In addition to English-language articles, over 35 volunteers lead translation and localization efforts for Chinese, French, Japanese, Korean, Portuguese, Russian, and Spanish.

Build the site

To set up the site locally, you need to have Node.js and Yarn installed. You can check if these are installed by running the following commands:

node -v
yarn -v

After you have installed Node.js and Yarn, you can install the dependencies using yarn and start the local preview:

yarn
yarn start

Once started, a live preview is available at http://localhost:5042/.

Contribute to MDN Web Docs

You can contribute to MDN Web Docs and be a part of our community through content contributions, engineering, or translation work. The MDN Web Docs project welcomes contributions from everyone who shares our goals and wants to contribute constructively and respectfully within our community.

To find out how to get started, see the CONTRIBUTING.md document in this repository. By participating in and contributing to our projects and discussions, you acknowledge that you have read and agree to our Code of Conduct, which means adhering to Mozilla's Community Participation Guidelines.

Get in touch

You can communicate with the MDN Web Docs team and community using the communication channels.