webpack.production.config.js

const path = require('path');
const webpack = require('webpack');
const CompressionPlugin = require('compression-webpack-plugin');
const HtmlWebpackPlugin = require('html-webpack-plugin');
require('dotenv').config();

const DIST_DIR = path.resolve(__dirname, 'public');
const SRC_DIR = path.resolve(__dirname, 'client/src/');

const globalconstiables = {
  API_URL: JSON.stringify(process.env.API_URL)
};


const config = {
  entry: `${SRC_DIR}/index.jsx`,
  output: {
    path: DIST_DIR,
    filename: 'bundle.js'
  },
  module: {
    loaders: [
      {
        test: /\.(js|jsx)$/,
        loader: 'babel-loader',
        exclude: /node_modules/,
        include: SRC_DIR,
        query: {
          presets: ['react', 'es2015', 'stage-2']
        }
      },
      {
        test: /\.scss$/,
        loaders: ['style-loader', 'css-loader', 'sass-loader']
      },
      {
        test: /\.(jpe?g|png|gif|svg)$/i,
        loader: 'file-loader',
        options: {
          name: '[path][name].[hash].[ext]'
        }
      },
      {
        test: /\.(jpg|png|svg)$/,
        loader: 'url-loader',
        options: {
          limit: 5000,
        }
      }
    ]
  },
  resolve: {
    extensions: ['.js', '.jsx']
  },
  plugins: [
    new webpack.DefinePlugin(globalconstiables),
    new webpack.DefinePlugin({
      'process.env': {
        NODE_ENV: JSON.stringify('production')
      }
    }),
    new HtmlWebpackPlugin({
      inject: true,
      template: path.join(__dirname, 'index.html'),
      minify: {
        removeComments: true,
        collapseWhitespace: true,
        removeRedundantAttributes: true,
        useShortDoctype: true,
        removeEmptyAttributes: true,
        removeStyleLinkTypeAttributes: true,
        keepClosingSlash: true,
        minifyJS: true,
        minifyCSS: true,
        minifyURLs: true
      }
    }),
    new webpack.optimize.UglifyJsPlugin(),
    new CompressionPlugin({
      asset: '[path].gz[query]',
      algorithm: 'gzip',
      test: /\.js$|\.css$|\.html$/,
      threshold: 10240,
      minRatio: 0.8
    })
  ],

};


module.exports = config;