webpack.production.config.js

const { resolve } = require('path');
const webpack = require('webpack');
const HtmlWebpackPlugin = require('html-webpack-plugin');
const CopyWebpackPlugin = require('copy-webpack-plugin');
const ExtractTextPlugin = require('extract-text-webpack-plugin');
const UglifyJsPlugin = require('uglifyjs-webpack-plugin');

const config = {
  stats: {
    maxModules: 0
  },
  mode: 'production',
  devtool: 'cheap-module-source-map',

  entry: [
    './main.js',
    './assets/scss/main.scss',
  ],

  context: resolve(__dirname, 'app'),

  output: {
    filename: '[name].[chunkhash].js',
    chunkFilename: '[name].[chunkhash].js',
    path: resolve(__dirname, 'dist'),
    publicPath: '',
  },

  plugins: [
    new webpack.optimize.ModuleConcatenationPlugin(),
    new HtmlWebpackPlugin({
      template: `${__dirname}/app/index.html`,
      filename: 'index.html',
      inject: 'body',
    }),
    new webpack.optimize.OccurrenceOrderPlugin(),
    new webpack.LoaderOptionsPlugin({
      minimize: true,
      debug: false,
    }),
    new webpack.DefinePlugin({ 'process.env': { NODE_ENV: JSON.stringify('production') } }),
    new ExtractTextPlugin({ filename: './styles/style.css', disable: false, allChunks: true }),
    new CopyWebpackPlugin([{ from: './vendors', to: 'vendors' }]),
  ],

  optimization: {
    runtimeChunk: false,
    splitChunks: {
      cacheGroups: {
        commons: {
          test: /[\\/]node_modules[\\/]/,
          name: 'vendors',
          chunks: 'all',
        },
      },
    },
    minimizer: [
      new UglifyJsPlugin({
        cache: true,
        parallel: true,
        sourceMap: true
      })
    ]
  },

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

  module: {
    rules: [
      {
        test: /\.jsx?$/,
        exclude: /node_modules/,
        loader: 'babel-loader',
      },
      {
        test: /\.scss$/,
        exclude: /node_modules/,
        use: ExtractTextPlugin.extract({
          fallback: 'style-loader',
          use: [
            'css-loader',
            { loader: 'sass-loader', query: { sourceMap: false } },
          ],
          publicPath: '../'
        }),
      },
      {
        test: /\.(png|jpg|gif)$/,
        use: [
          {
            loader: 'url-loader',
            options: {
              limit: 8192,
              mimetype: 'image/png',
              name: 'images/[name].[ext]',
            }
          }
        ],
      },
      {
        test: /\.eot(\?v=\d+.\d+.\d+)?$/,
        use: [
          {
            loader: 'file-loader',
            options: {
              name: 'fonts/[name].[ext]'
            }
          }
        ],
      },
      {
        test: /\.woff(2)?(\?v=[0-9]\.[0-9]\.[0-9])?$/,
        use: [
          {
            loader: 'url-loader',
            options: {
              limit: 8192,
              mimetype: 'application/font-woff',
              name: 'fonts/[name].[ext]',
            }
          }
        ],
      },
      {
        test: /\.[ot]tf(\?v=\d+.\d+.\d+)?$/,
        use: [
          {
            loader: 'url-loader',
            options: {
              limit: 8192,
              mimetype: 'application/octet-stream',
              name: 'fonts/[name].[ext]',
            }
          }
        ],
      },
      {
        test: /\.svg(\?v=\d+\.\d+\.\d+)?$/,
        use: [
          {
            loader: 'url-loader',
            options: {
              limit: 8192,
              mimetype: 'image/svg+xml',
              name: 'images/[name].[ext]',
            }
          }
        ],
      },
    ]
  },
};

module.exports = config;