webpack.config.babel.js

import path from 'path';
import HtmlWebpackPlugin from 'html-webpack-plugin';
import webpack from 'webpack';
import ExtractTextPlugin from 'extract-text-webpack-plugin';

export default () => ({
    entry: [
        'webpack-dev-server/client?http://localhost:8080', // webpack dev server host and port
        path.join(__dirname, 'src/index.jsx'), // entry point of app
    ],
    output: {
        path: path.join(__dirname + '/dist'),
        filename: 'bundle.js',
    },
    plugins: [
        new HtmlWebpackPlugin({
           filename: 'index.html',
           template: './src/index.html'
        }),
        // Necessary b/c golden-layout depends on all 3 of these libs via UMD globals
        new webpack.ProvidePlugin({
            React: 'react',
            ReactDOM: 'react-dom',
            $: 'jquery',
            jQuery: 'jquery'
        }),
        new ExtractTextPlugin('styles.css')
    ],
    module: {
        rules: [
            {
                test: /\.jsx?$/,
                exclude: /node_modules/,
                include: path.join(__dirname, 'src'),
                use: [{
                    loader: 'babel-loader',
                    options: {
                        babelrc: false, // Tells webpack not to use the .babelrc file
                        presets: [
                            ['babel-preset-env', {
                                "targets": { "firefox": 52, "chrome": 55 },
                                "modules": false,
                                "loose": true
                            }],
                            'react' // Transform JSX into React.createElement calls
                        ]
                    },
                }]
            },
            {
                test: /\.css$/,
                exclude: /node_modules/,
                include: path.join(__dirname, 'css'),
                use: ExtractTextPlugin.extract({
                    fallback: 'style-loader',
                    use: 'css-loader'
                })
            }
        ]
    },
    resolve: {
        extensions: ['.js', '.jsx']
    },
    devtool: 'source-map'
});