prod.config.js

// Webpack config for creating the production bundle.

var path = require('path');
var webpack = require('webpack');
var CleanPlugin = require('clean-webpack-plugin');
var ExtractTextPlugin = require('extract-text-webpack-plugin');
var autoprefixer = require('autoprefixer-stylus');
var strip = require('strip-loader');

var relativeAssetsPath = '../static/dist';
var assetsPath = path.join(__dirname, relativeAssetsPath);

// https://github.com/halt-hammerzeit/webpack-isomorphic-tools
var WebpackIsomorphicToolsPlugin = require('webpack-isomorphic-tools/plugin');
var webpackIsomorphicToolsPlugin = new WebpackIsomorphicToolsPlugin(require('./webpack-isomorphic-tools'));

module.exports = {
  devtool: 'source-map',
  context: path.resolve(__dirname, '..'),
  entry: {
    'main': './src/client.js'
  },
  output: {
    path: assetsPath,
    filename: '[name]-[chunkhash].js',
    chunkFilename: '[name]-[chunkhash].js',
    publicPath: '/dist/'
  },
  module: {
    loaders: [
      {test: /\.js$/, exclude: /node_modules/, loaders: [strip.loader('console.log', 'debug'), 'babel']},
      {test: /\.json$/, loader: 'json-loader'},
      {test: /\.styl$/, loader: ExtractTextPlugin.extract('style', 'css-loader!stylus-loader') },
      {test: webpackIsomorphicToolsPlugin.regular_expression('images'), loader: 'url-loader?limit=10240'}
    ]
  },
  stylus: {
    use: [autoprefixer()]
  },
  progress: true,
  resolve: {
    modulesDirectories: [
      'src',
      'node_modules'
    ],
    extensions: ['', '.json', '.js']
  },
  plugins: [
    new CleanPlugin([relativeAssetsPath]),

    new ExtractTextPlugin('[name]-[chunkhash].css', {allChunks: true}),
    new webpack.DefinePlugin({
      __CLIENT__: true,
      __SERVER__: false,
      __DEVELOPMENT__: false,
      __DEVTOOLS__: false
    }),

    // ignore dev config
    new webpack.IgnorePlugin(/\.\/dev/, /\/config$/),

    // set global vars
    new webpack.DefinePlugin({
      'process.env': {
        // Useful to reduce the size of client-side libraries, e.g. react
        NODE_ENV: JSON.stringify('production')
      }
    }),

    // optimizations
    new webpack.optimize.DedupePlugin(),
    new webpack.optimize.OccurenceOrderPlugin(),
    new webpack.optimize.UglifyJsPlugin({
      compress: {
        warnings: false
      }
    }),

    webpackIsomorphicToolsPlugin
  ]
};