webpack.config.prod.js

// For info about this file refer to webpack and webpack-hot-middleware documentation
// For info on how we're generating bundles with hashed filenames for cache busting:
// https://medium.com/@okonetchnikov/long-term-caching-of-static-assets-with-webpack-1ecb139adb95#.w99i89nsz
import webpack from 'webpack';
import HtmlWebpackPlugin from 'html-webpack-plugin';
import MiniCssExtractPlugin from 'mini-css-extract-plugin';
import { CleanWebpackPlugin } from 'clean-webpack-plugin';
import { BundleAnalyzerPlugin } from 'webpack-bundle-analyzer';
import CopyPlugin from 'copy-webpack-plugin';
import path from 'path';
const version = require('./package.json').version;
const GLOBALS = {
  'process.env.NODE_ENV': JSON.stringify('production'),
  'process.env.VERSION': JSON.stringify(version),
  __DEV__: false
};

export default {
  resolve: {
    extensions: ['*', '.js', '.jsx', '.json'],
    // To support react-hot-loader
    alias: {
      'react-dom': '@hot-loader/react-dom'
    }
  },
  devtool: 'source-map', // more info:https://webpack.js.org/guides/production/#source-mapping and https://webpack.js.org/configuration/devtool/
  entry: path.resolve(__dirname, '_source/index'),
  target: 'web',
  mode: 'production',
  output: {
    path: path.resolve(__dirname, '_public'),
    publicPath: '/',
    filename: '[name].[contenthash].js'
  },
  plugins: [
    // Remove _public folder before build
    new CleanWebpackPlugin(),

    // Analyze the bundle sizes
    new BundleAnalyzerPlugin({
      openAnalyzer: true
    }),

    // Copy translation files
    new CopyPlugin({
      patterns: [
        {
          from: '_source/_assets',
          to: '_assets'
        }
      ]
    }),

    // Tells React to build in prod mode. https://facebook.github.io/react/downloads.html
    new webpack.DefinePlugin(GLOBALS),

    // Generate an external css file with a hash in the filename
    new MiniCssExtractPlugin({
      filename: '[name].[contenthash].css'
    }),

    // Generate HTML file that contains references to generated bundles. See here for how this works:
    // https://github.com/ampedandwired/html-webpack-plugin#basic-usage
    new HtmlWebpackPlugin({
      template: '_source/index.ejs',
      favicon: '_source/_assets/icons/favicon.ico',
      minify: {
        removeComments: true,
        collapseWhitespace: true,
        removeRedundantAttributes: true,
        useShortDoctype: true,
        removeEmptyAttributes: true,
        removeStyleLinkTypeAttributes: true,
        keepClosingSlash: true,
        minifyJS: true,
        minifyCSS: true,
        minifyURLs: true
      },
      inject: true
      // Note that you can add custom options here if you need to handle other custom logic in index.html
    }),

    // fix "process is not defined" error:
    new webpack.ProvidePlugin({
      process: 'process/browser'
    })
  ],
  module: {
    rules: [
      {
        test: /\.jsx?$/,
        exclude: /node_modules/,
        use: ['babel-loader']
      },
      {
        test: /\.svg(\?v=\d+\.\d+\.\d+)?$/,
        use: [
          {
            loader: 'url-loader',
            options: {
              limit: 10000,
              mimetype: 'image/svg+xml',
              name: '[name].[ext]'
            }
          }
        ]
      },
      {
        test: /\.(jpe?g|png|gif|ico)$/i,
        use: [
          {
            loader: 'file-loader',
            options: {
              name: '[name].[ext]'
            }
          }
        ]
      },
      {
        test: /(\.css|\.scss|\.sass)$/,
        use: [
          MiniCssExtractPlugin.loader,
          {
            loader: 'css-loader',
            options: {
              sourceMap: true
            }
          },
          {
            loader: 'postcss-loader',
            options: {
              postcssOptions: {
                plugins: ['cssnano', 'autoprefixer']
              },
              sourceMap: true
            }
          },
          {
            loader: 'sass-loader',
            options: {
              sassOptions: {
                includePaths: [path.resolve(__dirname, '_source')]
              }
            }
          }
        ]
      }
    ]
  }
};