schelmo / postcss-nesting

Nest style rules inside each other

PostCSS Nesting

PostCSS Nesting lets you nest style rules inside each other, following the CSS Nesting specification.

a, b {
  color: red;

  & c, & d {
    color: white;
  }
}

/* becomes */

a, b {
  color: red;
}

a c, a d, b c, b d {
  color: white;
}

NOTICE: In a future version of this project, nesting at-rules like @media may be deprecated, as they are not part of the nesting proposal. In a comment, a CSSWG member expressed interest in handling nested @media while handling selector nesting. So deprecating nested at-rules has been temporarily delayed.

Usage

Add PostCSS Nesting to your project:

npm install postcss-nesting --save-dev

Use PostCSS Nesting to process your CSS:

import postcssNesting from 'postcss-nesting';

postcssNesting.process(YOUR_CSS /*, processOptions, pluginOptions */);

Or use it as a PostCSS plugin:

import postcss from 'postcss';
import postcssNesting from 'postcss-nesting';

postcss([
  postcssNesting(/* pluginOptions */)
]).process(YOUR_CSS /*, processOptions */);

PostCSS Nesting runs in all Node environments, with special instructions for:

Node	Webpack	Create React App	Gulp	Grunt