optimize-cssnano-plugin

It will search for CSS assets during the Webpack build and minimize it with cssnano. Solves extract-text-webpack-plugin CSS duplication problem.

Just like optimize-css-assets-webpack-plugin but more accurate with source maps.

Installation:

Using npm:

npm install --save-dev @intervolga/optimize-cssnano-plugin

Configuration:

const OptimizeCssnanoPlugin = require('@intervolga/optimize-cssnano-plugin');

module.exports = {
  module: {
    loaders: [
      {
        test: /\.css$/,
        loader: ExtractTextPlugin.extract("style-loader", "css-loader")
      }
    ]
  },
  plugins: [
    new ExtractTextPlugin("styles.css"),

    new OptimizeCssnanoPlugin({
      sourceMap: nextSourceMap,
      cssnanoOptions: {
        preset: ['default', {
          discardComments: {
            removeAll: true,
          },
        }],
      },
    }),
  ]
}