webpack.config.prod.js

import webpack from 'webpack';
import path from 'path';
import ExtractTextPlugin from 'extract-text-webpack-plugin';

const GLOBALS = {
  'process.env.NODE_ENV': JSON.stringify('production')
};

export default {
  // debug: true,
  devtool: 'source-map',
  // noInfo: false,
  entry: [
    path.resolve(__dirname, 'src/index')
  ],
  target: 'web',
  output: {
    path: __dirname + '/dist', // Note: Physical files are only output by the production build task `npm run build`.
    publicPath: '/',
    filename: 'bundle.js'
  },
  devServer: {
    contentBase: path.resolve(__dirname, 'dist')
  },
  plugins: [
    new webpack.optimize.OccurrenceOrderPlugin(),
    new webpack.DefinePlugin(GLOBALS),
    new ExtractTextPlugin({
      filename: "styles.css",
      disable: false,
      allChunks: true
    }),
    // new webpack.optimize.DedupePlugin(),
    // new webpack.optimize.UglifyJsPlugin()
    new webpack.optimize.UglifyJsPlugin({
      sourceMap: true,
      compress: {
        warnings: true
      }
    })
  ],
  module: {
    rules: [
      {test: /\.js$/, include: path.join(__dirname, 'src'), loaders: ['babel-loader']},
      {
        test: /(\.css)$/,
        // loader: ExtractTextPlugin.extract("css?sourceMap")
        // test: /(\.scss|\.css)$/,
        use: ExtractTextPlugin.extract({
          fallback: 'style-loader',
          use: 'css-loader',

          publicPath: "/dist"
        })
      },
      {test: /\.eot(\?v=\d+\.\d+\.\d+)?$/, loader: 'file-loader'},
      {test: /\.(woff|woff2)$/, loader: 'url-loader?prefix=font/&limit=5000'},
      {test: /\.ttf(\?v=\d+\.\d+\.\d+)?$/, loader: 'url-loader?limit=10000&mimetype=application/octet-stream'},
      {test: /\.svg(\?v=\d+\.\d+\.\d+)?$/, loader: 'url-loader?limit=10000&mimetype=image/svg+xml'}
    ]
  }
};