webpack.prod.js

const merge = require('webpack-merge')
const webpack = require('webpack')
const UglifyJSPlugin = require('uglifyjs-webpack-plugin')
const common = require('./webpack.common.js')
const HtmlWebpackPlugin = require('html-webpack-plugin')
const CleanWebpackPlugin = require('clean-webpack-plugin')
const ExtractTextPlugin = require('extract-text-webpack-plugin')

module.exports = merge(common, {
  mode: 'production',
  module: {
    rules: [
      {
        test: /\.less$/,
        use: ExtractTextPlugin.extract({
          fallback: 'style-loader',
          use: ['css-loader', 'less-loader']
        })
      }
    ]
  },
  plugins: [
    new CleanWebpackPlugin(['dist']),
    new UglifyJSPlugin(),
    new ExtractTextPlugin('styles.css'),
    new webpack.DefinePlugin({
      'process.env.NODE_ENV': JSON.stringify('production')
    }),
    new HtmlWebpackPlugin({
      template: 'src/assets/index.html'
    })
  ]
})