# MDN data

[https://github.com/mdn/data](https://github.com/mdn/data)

Maintained by the [MDN team at Mozilla](https://wiki.mozilla.org/MDN).

This repository contains general data for Web technologies.

This data is used in MDN documentation, to build
[information boxes](https://developer.mozilla.org/en-US/docs/Web/CSS/background)
or [sidebar navigation](https://developer.mozilla.org/en-US/docs/Web/API/Window).
External tools have started to make use of this data as well.
For example, the [CSSTree](https://github.com/csstree/csstree/) CSS parser.


[![NPM version](https://img.shields.io/npm/v/mdn-data.svg)](https://www.npmjs.com/package/mdn-data)
[![lint](https://github.com/mdn/data/actions/workflows/lint.yml/badge.svg)](https://github.com/mdn/data/actions/workflows/lint.yml)

## Repository contents

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

### api
Contains data about Web APIs:
* API inheritance (interface inheritance and mixin implementations)

### css
 Contains data about:
* CSS at-rules
* CSS properties
* CSS selectors
* CSS syntaxes
* CSS types
* CSS units

Read more about [CSS data](https://github.com/mdn/data/blob/master/css/readme.md) and the format of the files.


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

## Problems?

If you find a problem, please [file an issue](https://github.com/mdn/data/issues/new).

## Contributing

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 also the [Contributing file](https://github.com/mdn/data/blob/master/CONTRIBUTING.md) for more information.

## See also
* [https://github.com/mdn/browser-compat-data](https://github.com/mdn/browser-compat-data)
for compatibility data for Web technologies