webpack.prod.config.js

const path = require('path');
const webpack = require('webpack');
const CopyPlugin = require('copy-webpack-plugin');
const HtmlWebpackPlugin = require('html-webpack-plugin');
const MiniCssExtractPlugin = require('mini-css-extract-plugin');

const env = process.env.APP_ENV;

module.exports = {
  mode: 'production',

  entry: {
    main: './src/index.jsx',
  },

  output: {
    filename: 'js/main.[contenthash].js',
    chunkFilename: 'js/main.[id].[contenthash].js',
  },

  module: {
    rules: [
      {
        test: /\.jsx?$/,
        exclude: /node_modules/,
        use: ['babel-loader'],
      },
      {
        test: /\.pcss$/,
        use: [
          MiniCssExtractPlugin.loader,
          {
            loader: 'css-loader',
            options: {
              importLoaders: 1,
              modules: {
                localIdentName: '[hash:8]',
              },
            },
          },
          {
            loader: 'postcss-loader',
            options: { sourceMap: true },
          },
        ],
      },
      {
        test: /\.css$/,
        use: [MiniCssExtractPlugin.loader, 'css-loader'],
      },
      {
        test: /\.svg$/,
        use: ['@svgr/webpack'],
      },
      {
        test: /\.(png|jpe?g|gif|woff|woff2|ttf|eot)$/i,
        use: [
          {
            loader: 'url-loader',
            options: {
              limit: 8192,
              name: 'images/[name].[contenthash].[ext]',
            },
          },
        ],
      },
    ],
  },

  resolve: {
    extensions: ['.mjs', '.js', '.jsx'],
  },

  optimization: {
    minimize: true,
    moduleIds: 'deterministic',
    runtimeChunk: 'single',
    splitChunks: {
      cacheGroups: {
        vendor: {
          test: /[\\/]node_modules[\\/]/,
          name: 'vendors',
          chunks: 'all',
        },
      },
    },
  },

  plugins: [
    new CopyPlugin({
      patterns: [
        {
          context: 'src/static',
          from: '**/*',
          globOptions: {
            ignore: ['**/index.html'],
          },
        },
      ],
    }),
    new webpack.DefinePlugin({
      'process.env': {
        NODE_ENV: JSON.stringify('production'),
        APP_ENV: JSON.stringify(env),
      },
    }),
    new HtmlWebpackPlugin({
      inject: true,
      template: path.resolve(__dirname, 'src/static/index.html'),
    }),
    new MiniCssExtractPlugin({
      filename: 'css/main.[contenthash].css',
      chunkFilename: 'css/main.[id].[contenthash].css',
    }),
  ],
};