rollup-plugin-postcss

What is rollup-plugin-postcss?

rollup-plugin-postcss is a Rollup plugin that allows you to import and process CSS files with PostCSS. It supports various PostCSS plugins, CSS modules, and can even extract CSS into separate files.

What are rollup-plugin-postcss's main functionalities?

Importing CSS

This feature allows you to import CSS files directly into your JavaScript or TypeScript files. The imported styles can then be used within your components.

import styles from './styles.css';

Using PostCSS Plugins

This feature allows you to use PostCSS plugins like autoprefixer to process your CSS. The example demonstrates how to configure the plugin to use autoprefixer.

import postcss from 'rollup-plugin-postcss';
import autoprefixer from 'autoprefixer';

export default {
  input: 'src/index.js',
  output: {
    file: 'dist/bundle.js',
    format: 'cjs'
  },
  plugins: [
    postcss({
      plugins: [
        autoprefixer()
      ]
    })
  ]
};

Extracting CSS

This feature allows you to extract CSS into a separate file instead of including it in the JavaScript bundle. The example shows how to configure the plugin to extract CSS.

import postcss from 'rollup-plugin-postcss';

export default {
  input: 'src/index.js',
  output: {
    file: 'dist/bundle.js',
    format: 'cjs'
  },
  plugins: [
    postcss({
      extract: true
    })
  ]
};

CSS Modules

This feature allows you to use CSS Modules, which scope CSS by automatically creating unique class names. The example demonstrates how to enable CSS Modules in the plugin configuration.

import postcss from 'rollup-plugin-postcss';

export default {
  input: 'src/index.js',
  output: {
    file: 'dist/bundle.js',
    format: 'cjs'
  },
  plugins: [
    postcss({
      modules: true
    })
  ]
};

Other packages similar to rollup-plugin-postcss

rollup-plugin-css-only

rollup-plugin-css-only is a Rollup plugin that allows you to import CSS files and extract them into a separate file. Unlike rollup-plugin-postcss, it does not support PostCSS plugins or CSS Modules.

rollup-plugin-sass

rollup-plugin-sass is a Rollup plugin that allows you to import and compile Sass/SCSS files. It supports extracting CSS into separate files and can be used in conjunction with PostCSS plugins. However, it is specifically designed for Sass/SCSS rather than general CSS processing.

rollup-plugin-styles

rollup-plugin-styles is a versatile Rollup plugin that supports importing and processing CSS, Sass, Less, and Stylus files. It also supports PostCSS plugins and CSS Modules, making it a more comprehensive solution compared to rollup-plugin-postcss.

README

rollup-plugin-postcss

Seamless integration between Rollup and PostCSS.

Installation

npm install rollup-plugin-postcss

Example

rollup.config.js

import { rollup } from 'rollup';
import postcss from 'rollup-plugin-postcss';

rollup({
  entry: 'main.js',
  plugins: [
    postcss({
      plugins: [
        // cssnext(),
        // yourPostcssPlugin()
      ]
    })
  ]
}).then(...)

entry

import '/path/to/some_random_file.css'

License

MIT © EGOIST