webpack-prod.config.js

const webpack = require('webpack');
const ExtractTextPlugin = require('extract-text-webpack-plugin');
const HtmlWebpackPlugin = require('html-webpack-plugin');

module.exports = {
    entry: [ 'whatwg-fetch', './js/app.js' ],
    // Render source-map file for final build
    devtool: 'source-map',
    output: {
        filename: '[name].js',
        path: __dirname + '/dist',
    },
    module: {
        loaders: [
            {
                test: /\.js$/,
                exclude: /node_modules/,
                loader: 'babel-loader?compact=false',
            },
            {
                test: /\.css$/,
                loader: ExtractTextPlugin.extract('css-loader')
            },
            {
                test: /\.(png|jpg|jpeg|gif|svg|woff|woff2|ttf|eot)$/,
                loader: "file-loader?name=assets/[name].[ext]"
            }
        ]
    },
    resolve: {
        alias: {
            // Bind version of jquery-ui
            "jquery-ui": "jquery-ui/jquery-ui.js"
        }
    },
    plugins: [
        // Define production build to allow React to strip out unnecessary checks
        new webpack.DefinePlugin({
            'process.env':{
                'NODE_ENV': JSON.stringify('production')
            }
        }),
        // Minify the bundle
        new webpack.optimize.UglifyJsPlugin({
            compress: {
                // suppresses warnings, usually from module minification
                warnings: false,
                drop_console: true,
                collapse_vars: true,
                reduce_vars: true
            },
            output: {
                comments: false
            }
        }),
        new webpack.ProvidePlugin({
            // Automtically detect jQuery and $ as free var in modules
            // and inject the jquery library
            // This is required by many jquery plugins
            $: 'jquery',
            jQuery: 'jquery'
        }),
        new ExtractTextPlugin('[name].css'),
        new HtmlWebpackPlugin({
            template: 'index.html'
        })
    ]
};