webpack.prod.config.js

const CleanWebpackPlugin = require('clean-webpack-plugin');
const ExtractTextPlugin = require('extract-text-webpack-plugin');
const StyleLintPlugin = require('stylelint-webpack-plugin');
const HtmlWebpackPlugin = require('html-webpack-plugin');
const UglifyJsPlugin = require('uglifyjs-webpack-plugin');
const merge = require('webpack-merge');
const common = require('./webpack.common.config');
const path = require('path');
const SpeedMeasurePlugin = require("speed-measure-webpack-plugin");

const smp = new SpeedMeasurePlugin();

const {
  EnvironmentPlugin,
} = require('webpack');

const {
  GENERAL,
  PATHS,
} = require('../../settings');

module.exports = smp.wrap(merge(common, {
  mode: 'production',
  devtool: 'source-map',
  module: {
    rules: [
      {
        test: /\.tsx?$/,
        exclude: /node_modules/,
        loader: 'tslint-loader',
        enforce: 'pre',
        options: {
          configFile: PATHS.configs.tslint,
          emitErrors: true,
          typeCheck: true,
          tsConfigFile: PATHS.configs.tsconfig,
        },
      },
      {
        test: /\.(s*)css$/,
        exclude: /node_modules/,
        use: ExtractTextPlugin.extract({
          fallback: {
            loader: 'style-loader',
            options: {
              sourceMap: false,
            }
          },
          use: [
            {
              loader: 'css-loader',
              options: {
                importLoaders: 2,
                localIdentName: '[name]__[hash:base64:6]',
                minimize: true,
                modules: true,
                namedExport: true,
                sourceMap: false,
              },
            },
            {
              loader: 'postcss-loader',
              options: {
                sourceMap: false,
              },
            },
            {
              loader: 'sass-loader',
              options: {
                sourceMap: false,
              },
            },
          ],
        })
      }
    ]
  },
  optimization: {
    runtimeChunk: 'single',
    splitChunks: {
      chunks: 'all',
      maxInitialRequests: Infinity,
      minSize: 0,
      cacheGroups: {
        vendor: {
          test: /[\\/]node_modules[\\/]/,
          name(module) {
            const packageName = module.context.match(/[\\/]node_modules[\\/](.*?)([\\/]|$)/)[1];
            return `npm.${packageName.replace('@', '')}`;
          },
        },
      }
    },
    minimizer: [
      new UglifyJsPlugin({
        cache: path.join(PATHS.cache, 'uglifyjs-webpack-plugin'),
        parallel: true,
        sourceMap: false,
        uglifyOptions: {
          compress: true,
          mangle: true,
        },
      }),
    ]
  },
  plugins: [
    new CleanWebpackPlugin([PATHS.static, PATHS.templates], {
      root: PATHS.backend,
    }),
    new ExtractTextPlugin({
      allChunks: true,
      filename: '[name].[hash].css',
    }),
    new HtmlWebpackPlugin({
      filename: PATHS.index.output,
      template: PATHS.index.input,
      title: GENERAL.name,
      cache: true,
      minify: true,
    }),
    new StyleLintPlugin({
      configFile: PATHS.configs.stylelint,
      context: PATHS.client,
      emitErrors: true,
      files: [
        'styles/*.scss',
        'app/**/*.scss',
      ],
      syntax: 'scss',
      quiet: true,
    }),
    new EnvironmentPlugin({
      // * explicitly setting the node environment variable for clarity
      NODE_ENV: 'production',
    }),
  ],
}));