webpack.prod.js

const path = require('path')
const webpack = require('webpack')
const HtmlWebPackPlugin = require('html-webpack-plugin')
const { CleanWebpackPlugin } = require('clean-webpack-plugin')
const MiniCssExtractPlugin = require('mini-css-extract-plugin');
const OptimizeCSSAssetsPlugin = require('optimize-css-assets-webpack-plugin');
const TerserPlugin = require('terser-webpack-plugin');
const WorkboxPlugin = require('workbox-webpack-plugin');


module.exports = {
  entry: './src/client/index.js',
  devtool: 'source-map',
  mode: "production",
  optimization: {
      minimizer: [new TerserPlugin({}), new OptimizeCSSAssetsPlugin({})],
  },
  watch: true,
  output: {
    libraryTarget: 'var',
    library: 'Client'
  },
  module: {
    rules: [
      {
        test: '/\.js$/',
        exclude: /node_modules/,
        loader: "babel-loader"
      },
      {
        test: /\.scss$/,
        use: [ MiniCssExtractPlugin.loader, 'css-loader', 'sass-loader' ]
      },
      {
        test: /\.(png|svg|jpg|gif)$/,
        use: ['file-loader']
      },
    ]
  },
  plugins: [
    new HtmlWebPackPlugin({
      template: "./src/client/views/index.html",
      filename: "./index.html"

    }),
    new CleanWebpackPlugin({
      // Simulate the removal of files
      dry: true,
      // Write Logs to Console
      verbose: true,
      // Automatically remove all unused webpack assets on rebuild
      cleanStaleWebpackAssets: true,
      protectWebpackAssets: false
    }),
    new MiniCssExtractPlugin({filename: '[name].css'}),
    new WorkboxPlugin.GenerateSW()
  ]
}