create-react-app/config/webpack.config.prod.js

/**
 * Copyright (c) 2015-present, Facebook, Inc.
 * All rights reserved.
 *
 * This source code is licensed under the BSD-style license found in the
 * LICENSE file in the root directory of this source tree. An additional grant
 * of patent rights can be found in the PATENTS file in the same directory.
 */

var path = require('path');
var autoprefixer = require('autoprefixer');
var webpack = require('webpack');
var HtmlWebpackPlugin = require('html-webpack-plugin');
var ExtractTextPlugin = require('extract-text-webpack-plugin');
var url = require('url');
var paths = require('./paths');

var homepagePath = require(paths.appPackageJson).homepage;
var publicPath = homepagePath ? url.parse(homepagePath).pathname : '/';
if (!publicPath.endsWith('/')) {
  // Prevents incorrect paths in file-loader
  publicPath += '/';
}

module.exports = {
  bail: true,
  devtool: 'source-map',
  entry: path.join(paths.appSrc, 'index'),
  output: {
    path: paths.appBuild,
    filename: '[name].[chunkhash].js',
    chunkFilename: '[name].[chunkhash].chunk.js',
    publicPath: publicPath
  },
  resolve: {
    extensions: ['', '.js'],
  },
  resolveLoader: {
    root: paths.ownNodeModules,
    moduleTemplates: ['*-loader']
  },
  module: {
    preLoaders: [
      {
        test: /\.js$/,
        loader: 'eslint',
        include: paths.appSrc
      }
    ],
    loaders: [
      {
        test: /\.js$/,
        include: paths.appSrc,
        loader: 'babel',
        query: require('./babel.prod')
      },
      {
        test: /\.css$/,
        include: [paths.appSrc, paths.appNodeModules],
        // Disable autoprefixer in css-loader itself:
        // https://github.com/webpack/css-loader/issues/281
        // We already have it thanks to postcss.
        loader: ExtractTextPlugin.extract('style', 'css?-autoprefixer!postcss')
      },
      {
        test: /\.json$/,
        include: [paths.appSrc, paths.appNodeModules],
        loader: 'json'
      },
      {
        test: /\.(jpg|png|gif|eot|svg|ttf|woff|woff2)$/,
        include: [paths.appSrc, paths.appNodeModules],
        loader: 'file',
      },
      {
        test: /\.(mp4|webm)$/,
        include: [paths.appSrc, paths.appNodeModules],
        loader: 'url?limit=10000'
      }
    ]
  },
  eslint: {
    // TODO: consider separate config for production,
    // e.g. to enable no-console and no-debugger only in prod.
    configFile: path.join(__dirname, 'eslint.js'),
    useEslintrc: false
  },
  postcss: function() {
    return [autoprefixer];
  },
  plugins: [
    new HtmlWebpackPlugin({
      inject: true,
      template: paths.appHtml,
      favicon: paths.appFavicon,
      minify: {
        removeComments: true,
        collapseWhitespace: true,
        removeRedundantAttributes: true,
        useShortDoctype: true,
        removeEmptyAttributes: true,
        removeStyleLinkTypeAttributes: true,
        keepClosingSlash: true,
        minifyJS: true,
        minifyCSS: true,
        minifyURLs: true
      }
    }),
    new webpack.DefinePlugin({ 'process.env.NODE_ENV': '"production"' }),
    new webpack.optimize.OccurrenceOrderPlugin(),
    new webpack.optimize.DedupePlugin(),
    new webpack.optimize.UglifyJsPlugin({
      compressor: {
        screw_ie8: true,
        warnings: false
      },
      mangle: {
        screw_ie8: true
      },
      output: {
        comments: false,
        screw_ie8: true
      }
    }),
    new ExtractTextPlugin('[name].[contenthash].css')
  ]
};