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NoteWe are in the process of deprecating themdn/data package in favor ofw3c/webref.If you depend on this project, let us know in our communityGitHub discussions.Thank you.

This repository contains general data for Web technologies and is maintained by theMDN team at Mozilla.

The data in this repository is used in MDN Web Docs to buildinformation boxes andsidebar navigation.External tools make use of this data as well, for example, theCSSTree CSS parser.

There's a top-level directory for each broad area covered: for example,api andcss.Inside each of these directories is one or more JSON files containing the data.

Contains data about Web APIs:

• API inheritance (interface inheritance and mixin implementations)

Contains data about:

• CSS at-rules
• CSS functions
• CSS properties
• CSS selectors
• CSS syntaxes
• CSS types
• CSS units

For more information, see theCSS data documentation and theUpdating CSS JSON DB guide.

The l10n folder contains localization strings that are used in the variousjson files throughout this repository.

If you find a problem, pleasefile an issue.

We're very happy to accept contributions to this data.Please familiarize yourself with the schema for the data you're editing, and send us a pull request.See theCONTRIBUTING.md document for more information.

• https://github.com/mdn/browser-compat-datafor compatibility data for Web technologies