webpack.common.js

// import webpack from 'webpack';
// import path from 'path';
// import BundleTracker from 'webpack-bundle-tracker';
const UglifyJsPlugin = require("uglifyjs-webpack-plugin");
const MiniCssExtractPlugin = require("mini-css-extract-plugin");
const OptimizeCSSAssetsPlugin = require("optimize-css-assets-webpack-plugin");
const webpack = require('webpack');
const path = require('path');
const BundleTracker = require('webpack-bundle-tracker');

const BUILD_DIR = path.resolve(__dirname, 'assets/build');
const APP_DIR = path.resolve(__dirname, 'assets/js');

const config = {
  context: __dirname,
  entry: [
    `${APP_DIR}/entry.jsx`
  ],
  output: {
    path: BUILD_DIR,
    filename: '[name]-[hash].js'
  },
  module: {
    rules: [
      {
        test: /\.jsx?$/,
        include: APP_DIR,
        exclude: /node_modules/,
        use: {
          loader: 'babel-loader',
          options: {
            presets: ['env', 'react'],
            plugins: []
          }
        }
      },
      {
        test: /\.ne$/,
        loader: 'nearley-loader'
      },
      { // scss loader for webpack
        test: /\.scss$/,
        use: [
          // fallback to style-loader in development
          process.env.NODE_ENV !== 'production' ? 'style-loader' : MiniCssExtractPlugin.loader,
          "css-loader",
          "sass-loader"
        ]
      },
      {
        test: /\.css$/,
        use: [
          MiniCssExtractPlugin.loader,
          "css-loader"
        ]
      },
      {
        test: /\.styl$/,
        loader: 'style!css!stylus'
      },
      {
        test: /\.(mp4|webm|mp3|ogg|wav|jpeg|jpg|bmp|ico|png|gif|ttf|otf|woff|eot)$/,
        loader: 'file-loader?name=[path][name].[ext]?[hash]'
      }
    ]
  },
  optimization: {
    minimizer: [
      new UglifyJsPlugin({
        cache: true,
        parallel: true,
        sourceMap: true // set to true if you want JS source maps
      }),
      new OptimizeCSSAssetsPlugin({})
    ]
  },
  plugins: [
    new webpack.NoEmitOnErrorsPlugin(),
    new BundleTracker({filename: './webpack-stats.json'}),
    new MiniCssExtractPlugin({
      // Options similar to the same options in webpackOptions.output
      // both options are optional
      filename: "[name].css",
      chunkFilename: "[id].css"
    })
  ]
};

module.exports = config;