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;
}

Usage

Add PostCSS Nesting to your build tool:

npm install postcss-nesting --save-dev

Node

Use PostCSS Nesting to process your CSS:

import postcssNesting from 'postcss-nesting';

postcssNesting.process(YOUR_CSS);

PostCSS

Add PostCSS to your build tool:

npm install postcss --save-dev

Use PostCSS Nesting as a plugin:

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

postcss([
  postcssNesting(/* options */)
]).process(YOUR_CSS);

Webpack

Add PostCSS Loader to your build tool:

npm install postcss-loader --save-dev

Use PostCSS Nesting in your Webpack configuration:

import postcssNesting from 'postcss-nesting';

export default {
  module: {
    rules: [
      {
        test: /\.css$/,
        use: [
          'style-loader',
          { loader: 'css-loader', options: { importLoaders: 1 } },
          { loader: 'postcss-loader', options: {
            ident: 'postcss',
            plugins: () => [
              postcssNesting(/* options */)
            ]
          } }
        ]
      }
    ]
  }
}

Gulp

Add Gulp PostCSS to your build tool:

npm install gulp-postcss --save-dev

Use PostCSS Nesting in your Gulpfile:

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

gulp.task('css', () => gulp.src('./src/*.css').pipe(
  postcss([
    postcssNesting(/* options */)
  ])
).pipe(
  gulp.dest('.')
));

Grunt

Add Grunt PostCSS to your build tool:

npm install grunt-postcss --save-dev

Use PostCSS Nesting in your Gruntfile:

import postcssNesting from 'postcss-nesting';

grunt.loadNpmTasks('grunt-postcss');

grunt.initConfig({
  postcss: {
    options: {
      use: [
       postcssNesting(/* options */)
      ]
    },
    dist: {
      src: '*.css'
    }
  }
});

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