80 lines
2.2 KiB
Markdown
80 lines
2.2 KiB
Markdown
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# PostCSS Nesting [<img src="https://postcss.github.io/postcss/logo.svg" alt="PostCSS" width="90" height="90" align="right">][postcss]
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[![NPM Version][npm-img]][npm-url]
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[![CSS Standard Status][css-img]][css-url]
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[![Build Status][cli-img]][cli-url]
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[![Support Chat][git-img]][git-url]
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[PostCSS Nesting] lets you nest style rules inside each other, following the
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[CSS Nesting] specification.
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```pcss
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a, b {
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color: red;
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& c, & d {
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color: white;
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}
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}
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/* becomes */
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a, b {
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color: red;
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}
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a c, a d, b c, b d {
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color: white;
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}
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```
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**NOTICE**: In a future version of this project, nesting at-rules like `@media`
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may be deprecated, as they are not part of the nesting proposal. In a comment,
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a CSSWG member expressed interest in handling nested `@media` while handling
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selector nesting. So deprecating nested at-rules has been temporarily delayed.
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## Usage
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Add [PostCSS Nesting] to your project:
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```bash
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npm install postcss-nesting --save-dev
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```
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Use [PostCSS Nesting] to process your CSS:
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```js
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import postcssNesting from 'postcss-nesting';
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postcssNesting.process(YOUR_CSS /*, processOptions, pluginOptions */);
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```
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Or use it as a [PostCSS] plugin:
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```js
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import postcss from 'postcss';
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import postcssNesting from 'postcss-nesting';
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postcss([
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postcssNesting(/* pluginOptions */)
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]).process(YOUR_CSS /*, processOptions */);
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```
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[PostCSS Nesting] runs in all Node environments, with special instructions for:
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| [Node](INSTALL.md#node) | [Webpack](INSTALL.md#webpack) | [Create React App](INSTALL.md#create-react-app) | [Gulp](INSTALL.md#gulp) | [Grunt](INSTALL.md#grunt) |
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| --- | --- | --- | --- | --- |
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[cli-img]: https://img.shields.io/travis/jonathantneal/postcss-nesting.svg
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[cli-url]: https://travis-ci.org/jonathantneal/postcss-nesting
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[css-img]: https://cssdb.org/badge/nesting-rules.svg
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[css-url]: https://cssdb.org/#nesting-rules
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[git-img]: https://img.shields.io/badge/support-chat-blue.svg
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[git-url]: https://gitter.im/postcss/postcss
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[npm-img]: https://img.shields.io/npm/v/postcss-nesting.svg
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[npm-url]: https://www.npmjs.com/package/postcss-nesting
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[CSS Nesting]: https://drafts.csswg.org/css-nesting-1/
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[PostCSS]: https://github.com/postcss/postcss
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[PostCSS Nesting]: https://github.com/jonathantneal/postcss-nesting
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