css-url-loader

Webpack loader to transform URLs to other URLs in CSS.

Description

Transform URLs to other URLs in the url()s in your CSS. You can change relative urls to absolute urls, or you can change old urls to new urls that you want.

Install

npm install --save-dev css-url-loader

Or

yarn add --dev css-url-loader

Usage

When you want to trasform url(/assets/...) to url(https://domain/assets/...), the webpack.config.js is below

module.exports = {
  ...
  module: {
    rules: [
      ...
      {
        test: /\.css$/,
        use: ExtractTextPlugin.extract({
          fallback: 'style-loader',
          use: [
            'css-loader',
            {
              loader: 'css-url-loader',
              query: {
                from: '/assets/',
                to: 'https://domain/assets/'
              }
            }
          ],
        }),
      },
      ...
    ],
  },
  plugins: [
    ...
    new ExtractTextPlugin('bundle.css'),
    ...
  ],

When you want to trasform url(/assets/...) to url(/dir/assets/...), the webpack.config.js is below

module.exports = {
  ...
  module: {
    rules: [
      ...
      {
        test: /\.css$/,
        use: ExtractTextPlugin.extract({
          fallback: 'style-loader',
          use: [
            'css-loader',
            {
              loader: 'css-url-loader',
              query: {
                from: '/assets/',
                to: '/dir/assets/'
              }
            }
          ],
        }),
      },
      ...
    ],
  },
  plugins: [
    ...
    new ExtractTextPlugin('bundle.css'),
    ...
  ],

When you want to trasform urls when only development, the webpack.config.js is below

module.exports = {
  ...
  module: {
    rules: [
      ...
      {
        test: /\.css$/,
        use: ExtractTextPlugin.extract({
          fallback: 'style-loader',
          use: [
            'css-loader',
            {
              loader: 'css-url-loader',
              query: {
                from: '/assets/',
                to: '/tmp/assets/',
                env: 'development'
              }
            }
          ],
        }),
      },
      ...
    ],
  },
  plugins: [
    ...
    new ExtractTextPlugin('bundle.css'),
    ...
  ],

Options

Option	Description	Required
from	original url in url()	Y
to	transformed url	Y
env	value to control execution timing with process.env.NODE_ENV. Default is 'production'.	N