# @codemirror/lang-css [![NPM version](https://img.shields.io/npm/v/@codemirror/lang-css.svg)](https://www.npmjs.org/package/@codemirror/lang-css) [ [**WEBSITE**](https://codemirror.net/) | [**ISSUES**](https://github.com/codemirror/dev/issues) | [**FORUM**](https://discuss.codemirror.net/c/next/) | [**CHANGELOG**](https://github.com/codemirror/lang-css/blob/main/CHANGELOG.md) ] This package implements CSS language support for the [CodeMirror](https://codemirror.net/) code editor. The [project page](https://codemirror.net/) has more information, a number of [examples](https://codemirror.net/examples/) and the [documentation](https://codemirror.net/docs/). This code is released under an [MIT license](https://github.com/codemirror/lang-css/tree/main/LICENSE). We aim to be an inclusive, welcoming community. To make that explicit, we have a [code of conduct](http://contributor-covenant.org/version/1/1/0/) that applies to communication around the project. ## API Reference

css() → LanguageSupport: Language support for CSS.
cssLanguage: LRLanguage: A language provider based on the Lezer CSS parser, extended with highlighting and indentation information.
cssCompletionSource: CompletionSource: CSS property, variable, and value keyword completion source.
defineCSSCompletionSource(isVariable: fn(node: SyntaxNodeRef) → boolean) → CompletionSource: Create a completion source for a CSS dialect, providing a predicate for determining what kind of syntax node can act as a completable variable. This is used by language modes like Sass and Less to reuse this package's completion logic.