webpack.config.production.js

const path = require('path');
const merge = require('webpack-merge');
const webpack = require('webpack');
const ExtractTextPlugin = require('extract-text-webpack-plugin');
const CopyWebpackPlugin = require('copy-webpack-plugin');
const config = require('./webpack.config.base');

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

module.exports = merge(config, {
  debug: false,
  devtool: 'cheap-module-source-map',
  entry: {
    application: './src/index.js'
  },
  plugins: [
    // new CopyWebpackPlugin([
    //   {
    //     from: path.join(__dirname, '../src/client/assets/images'),
    //     to: 'images'
    //   }
    // ]),
    // Avoid publishing files when compilation fails
    new webpack.NoErrorsPlugin(),
    new webpack.DefinePlugin(GLOBALS),
    new webpack.optimize.DedupePlugin(),
    new webpack.optimize.UglifyJsPlugin({
      compress: {
        warnings: false,
        'screw_ie8': true
      },
      output: {
        comments: false
      },
      sourceMap: false
    }),
    new webpack.LoaderOptionsPlugin({
      minimize: true,
      debug: false
    }),
    new ExtractTextPlugin({
      filename: 'css/app.css',
      allChunks: true
    })
  ],
  module: {
    noParse: /\.min\.js$/,
    loaders: [
      // Sass
      {
        test: /\.scss$/,
        include: [
          path.resolve(__dirname, 'src')
        ],
        loader: ExtractTextPlugin.extract({
          fallbackLoader: 'style',
          loader: [
            { loader: 'css', query: { sourceMap: true } },
            'postcss',
            { loader: 'sass', query: { outputStyle: 'compressed' } }
          ]
        })
      },
      {
        test: /\.css$/,
        loader: ExtractTextPlugin.extract({
          fallbackLoader: 'style',
          loader: ['css', 'postcss']
        })
      }
    ]
  },
});