const sourceMap = true;

module.exports = {
  devtool: sourceMap && 'source-map',
  module: {
    rules: [
      {
        test: /\.css$/,
        use: [
          'style-loader',
          {
            loader: 'css-loader',
            options: { sourceMap }
          },
          // 'group-css-media-queries-loader',
          // or with config
          {
            loader: 'group-css-media-queries-loader',
            options: { sourceMap }
          }
        ]
      }
    ]
  }
}