webpack.prod.config.js

const path = require('path')
const webpack = require('webpack')
const merge = require('webpack-merge')
const common = require('./webpack.common.config')
const CleanWebpackPlugin = require('clean-webpack-plugin')
const ExtractTextPlugin = require('extract-text-webpack-plugin')

module.exports = merge(common, {
  devtool: 'sourcemap',
  module: {
    rules: [
      {
        test: /\.(less|css)$/,
        include: path.resolve(__dirname, 'ui/styles'),
        exclude: /node_modules/,
        use: ExtractTextPlugin.extract({
          fallback: 'style-loader',
          use: [
            {
              loader: 'css-loader',
              options: {
                modules: true,
                localIdentName: '[hash:base64:5]'
              }
            },
            {
              loader: 'less-loader'
            }
          ]
        })
      }
    ]
  },
  plugins: [
    new webpack.DefinePlugin({
      'process.env': {
        'NODE_ENV': JSON.stringify('production')
      }
    }),
    new webpack.NoEmitOnErrorsPlugin(),
    new webpack.optimize.UglifyJsPlugin({
      sourceMap: true,
      comments: false,
      compress: {
        unused: true,
        dead_code: true,
        warnings: true,
        drop_debugger: true,
        conditionals: true,
        evaluate: true,
        drop_console: true,
        sequences: true,
        booleans: true
      }
    }),
    new CleanWebpackPlugin(['styles', 'images', '*.*'], {
      verbose: true,
      root: path.resolve(__dirname, 'public')
    }),
    new ExtractTextPlugin({
      filename: '[name].[chunkhash].css'
    })
  ]
})