webpack.config.prod.babel.js

import path from 'path';
import webpack from 'webpack';
import ExtractTextPlugin from 'extract-text-webpack-plugin';
import BundleTracker from 'webpack-bundle-tracker';
import autoprefixer from 'autoprefixer';

const PATHS = {
    WEB: path.resolve(__dirname, process.env.WEB_PATH),
    DIST: path.resolve(__dirname, process.env.DIST_PATH),
    SRC: path.resolve(__dirname, process.env.SRC_PATH)
};

const sassLoaders = [
    'css-raw-loader?source-map',
    'postcss-loader',
    'sass-loader'
];

export default {
    devtool: 'source-map',
    entry: {
        sample: ['./js/main.js']
    },

    output: {
        path: PATHS.DIST,
        publicPath: '/static/dist/',
        filename: '[name].[chunkhash].js'
    },

    module: {
        loaders: [{
            test: /\.scss$/,
            loader: ExtractTextPlugin.extract("style-loader", sassLoaders.join('!'))
        }, {
            test: /\.js$/,
            exclude: /(node_modules|bower_components)/,
            loaders: ['babel']
        }]
    },

    postcss: [
        autoprefixer({
            browsers: ['last 2 versions']
        })
    ],

    plugins: [
        new ExtractTextPlugin("[name].[chunkhash].css"),
        new webpack.optimize.UglifyJsPlugin({
            compress: {
                warnings: false
            }
        }),
        new BundleTracker({
            path: PATHS.DIST,
            filename: 'webpack-stats.json'
        }),

        // Exit Plugin to process.exit(1)
        function() {
            this.plugin("done", (stats) => {
                if (stats.compilation.errors && stats.compilation.errors.length && process.argv.indexOf('--watch') === -1) {
                    process.on('beforeExit', () => {
                        process.exit(1);
                    });
                }
            });
        }
    ]
};