webpack.prod.js

var webpack = require('webpack');
var path = require('path');
var PACKAGE = require('./package.json');
var PACKAGE_NAME = PACKAGE.name + '-' + PACKAGE.version;
var BUILD_DIR = path.resolve(__dirname, 'bundle');
var APP_DIR = path.resolve(__dirname, 'src');

var CleanWebpackPlugin = require('clean-webpack-plugin');

var pathsToClean = ['bundle/'];
var cleanOptions = {
  root: __dirname,
  verbose: true,
};
var config = {
  entry: './index.js',
  output: {
    path: BUILD_DIR, //Path where the bundle should be exported
    filename: PACKAGE_NAME + '.js', //Filename
    publicPath: '/', //Where the js gets loaded from
  },
  module: {
    rules: [
      {
        test: /\.json$/,
        enforce: 'pre',
        use: 'json-loader',
      },
      {
        test: /\.jsx?/,
        include: APP_DIR,
        use: ['babel-loader'],
        exclude: /(node_modules|bower_components)/,
      },
    ],
  },
  resolve: {
    modules: [path.join(__dirname, 'src'), 'node_modules'],
  },
  plugins: [
    new webpack.optimize.UglifyJsPlugin({
      output: {
        comments: false,
      },
      compressor: {
        warnings: false,
        screw_ie8: true,
      },
    }),
    new webpack.DefinePlugin({
      'process.env.NODE_ENV': JSON.stringify('production'),
    }),
    new CleanWebpackPlugin(pathsToClean, cleanOptions),
  ],
};
module.exports = config;