rollup-plugin-merge-and-inject-css

A rollup plugin to collect and combine all the imported css file and inject them to the head at the top of style blocks list.

Install

npm install --save-dev rollup-plugin-merge-and-inject-css

yarn add rollup-plugin-merge-and-inject-css --dev

Plugin options

| Name | Type | Required | Description |----------|-------------------|----------|------------- | id | String | false | The id of your rollup build, it's needed to update build properly in watch mode. Default value is the random uid for a current watch run.

Usage

The common scenario for using this plugin is the merging of css files produced by different component. For example, it's useful for rollup-plugin-vue.

The default inject tool of this plugin will produce something like that:

  <style>
    .red-component {
      color: red;
    }
  </style>
  <style>
    .blue-component {
      color: blue;
    }
  </style>
  <style>
    .green-component {
      color: green;
    }
  </style>

This plugin will produce this (if all that components are the part of a generating bundle):

  <style>
    /*for=example-components*/
    .red-component {
      color: red;
    }
    .blue-component {
      color: blue;
    }
    .green-component {
      color: green;
    }
  </style>

Example

The example of the rollup config with this plugin

import autoprefixer from 'autoprefixer';
import Vue from 'rollup-plugin-vue';
import babel from 'rollup-plugin-babel';
import commonjs from 'rollup-plugin-commonjs';
import external from 'rollup-plugin-peer-deps-external';
import postcss from 'rollup-plugin-postcss';
import resolve from 'rollup-plugin-node-resolve';
import url from 'rollup-plugin-url';
import sass from 'rollup-plugin-sass';
import css from 'rollup-plugin-merge-and-inject-css'

import pkg from './package.json';

export default {
  input: 'src/index.js',
  output: [
    {
      file: pkg.main,
      format: 'cjs',
      sourcemap: true
    },
    {
      file: pkg.module,
      format: 'es',
      sourcemap: true
    }
  ],
  plugins: [
    external(),
    css({
      id: 'example-components'
    }),
    Vue({
      css: false,
      style: {
        postcssPlugins: [autoprefixer]
      }
    }),
    url(),
    babel({
      exclude: 'node_modules/**',
    }),
    resolve(),
    commonjs(),
  ]
}