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less/less.js · source

Snapshot 0 · 2026-11-04T12:47:21Z · JavaScript · Apache-2.0
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GitHub description at capture

Less. The dynamic stylesheet language.
README at capture

<p align="center"><img src="http://lesscss.org/public/img/less_logo.png" width="264" height="117"></p>

<p align="center">
    <a href="https://github.com/less/less.js/actions?query=branch%3Amaster"><img src="https://github.com/less/less.js/actions/workflows/ci.yml/badge.svg?branch=master" alt="Github Actions CI"/></a>
    <a href="https://www.npmtrends.com/less"><img src="https://img.shields.io/npm/dm/less.svg?sanitize=true" alt="Downloads"></a>
    <a href="https://www.npmjs.com/package/less"><img src="https://img.shields.io/npm/v/less.svg?sanitize=true" /></a>
    <a href="https://twitter.com/lesstocss"><img alt="Twitter Follow" src="https://img.shields.io/twitter/follow/lesstocss.svg?style=flat-square" style="max-width:100%;" /></a>
</p>

This is the Less.js monorepo.

## More information

For general information on the language, configuration options or usage visit [lesscss.org](http://lesscss.org).

Here are other resources for using Less.js:

* [stackoverflow.com][so] is a great place to get answers about Less.
* [Less.js Issues][issues] for reporting bugs


## Contributing
Please read [CONTRIBUTING.md](CONTRIBUTING.md). Add unit tests for any new or changed functionality. Lint and test your code using [Grunt](http://gruntjs.com).

### Reporting Issues

Before opening any issue, please search for existing issues and read the [Issue Guidelines](https://github.com/necolas/issue-guidelines), written by [Nicolas Gallagher](https://github.com/necolas). After that if you find a bug or would like to make feature request, [please open a new issue][issues].

Please report documentation issues in [the documentation project](https://github.com/less/less-docs).

### Development

Read [Developing Less](http://lesscss.org/usage/#developing-less).

## Release History
See the [changelog](CHANGELOG.md)

## Contributors

This project exists thanks to all the people who contribute. [[Contribute](CONTRIBUTING.md)].
<a href="https://github.com/less/less.js/graphs/contributors"><img src="https://opencollective.com/less/contributors.svg?width=890&button=false" /></a>

<!-- ALL-CONTRIBUTORS-LIST:START - Do not remove or modify this section -->
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<table>
  <tbody>
    <tr>
      <td align="center" valign="top" width="14.28%"><a href="https://github.com/matthew-dean"><img src="https://avatars.githubusercontent.com/u/414752?v=4?s=100" width="100px;" alt="Matthew Dean"/><br /><sub><b>Matthew Dean</b></sub></a><br /><a href="https://github.com/The Less CSS Team/Less.js/commits?author=matthew-dean" title="Code">💻</a> <a href="https://github.com/The Less CSS Team/Less.js/commits?author=matthew-dean" title="Documentation">📖</a> <a href="#maintenance-matthew-dean" title="Maintenance">🚧</a> <a href="#projectManagement-matthew-dean" title="Project Management">📆</a></td>
      <td align="center" valign="top" width="14.28%"><a href="https://cloudhead.io/"><img src="https://avatars.githubusercontent.com/u/40774?v=4?s=100" width="100px;" alt="Alexis Sellier"/><br /><sub><b>Alexis Sellier</b></sub></a><br /><a href="https://github.com/The Less CSS Team/Less.js/commits?author=cloudhead" title="Code">💻</a> <a href="https://github.com/The Less CSS Team/Less.js/commits?author=cloudhead" title="Documentation">📖</a></td>
      <td align="center" valign="top" width="14.28%"><a href="https://github.com/lukeapage"><img src="https://avatars.githubusercontent.com/u/309321?v=4?s=100" width="100px;" alt="Luke Page"/><br /><sub><b>Luke Page</b></sub></a><br /><a href="https://github.com/The Less CSS Team/Less.js/commits?author=lukeapage" title="Code">💻</a></td>
      <td align="center" valign="top" width="14.28%"><a href="https://github.com/seven-phases-max"><img src="https://avatars.githubusercontent.com/u/5304376?v=4?s=100" width="100px;" alt="Max Mikhailov"/><br /><sub><b>Max Mikhailov</b></sub></a><br /><a href="https://github.com/The Less CSS Team/Less.js/commits?author=seven-phases-max" title="Code">💻</a></td>
      <td align="center" valign="top" width="14.28%"><a href="https://github.com/iChenLei"><img src="https://avatars.githubusercontent.com/u/14012511?v=4?s=100" width="100px;" alt="Lei Chen"/><br /><sub><b>Lei Chen</b></sub></a><br /><a href="https://github.com/The Less CSS Team/Less.js/commits?author=iChenLei" title="Code">💻</a> <a href="https://github.com/The Less CSS Team/Less.js/issues?q=author%3AiChenLei" title="Bug reports">🐛</a> <a href="https://github.com/The Less CSS Team/Less.js/commits?author=iChenLei" title="Documentation">📖</a></td>
      <td align="center" valign="top" width="14.28%"><a href="https://github.com/puckowski"><img src="https://avatars.githubusercontent.com/u/3059609?v=4?s=100" width="100px;" alt="Daniel Puckowski"/><br /><sub><b>Daniel Puckowski</b></sub></a><br /><a href="https://github.com/The Less CSS Team/Less.js/commits?author=puckowski" title="Code">💻</a> <a href="https://github.com/The Less CSS Team/Less.js/issues?q=author%3Apuckowski" title="Bug reports">🐛</a></td>
    </tr>
  </tbody>
  <tfoot>
    <tr>
      <td align="center" size="13px" colspan="7">
        <img src="https://raw.githubusercontent.com/all-contributors/all-contributors-cli/1b8533af435da9854653492b1327a23a4dbd0a10/assets/logo-small.svg">
          <a href="https://all-contributors.js.org/docs/en/bot/usage">Add your contributions</a>
        </img>
      </td>
    </tr>
  </tfoot>
</table>

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<!-- ALL-CONTRIBUTORS-LIST:END -->


## [License](LICENSE)

Copyright (c) 2009-2025 [Alexis Sellier](http://cloudhead.io) & The Core Less Team
Licensed under the [Apache License](LICENSE).


[so]: http://stackoverflow.com/questions/tagged/less "StackOverflow.com"
[issues]: https://github.com/less/less.js/issues "GitHub Issues for Less.js"
[download]: https://github.com/less/less.js/zipball/master "Download Less.js"