webpack.config.js

const path = require('path')
const webpack = require('webpack')
const HtmlWebpackPlugin = require('html-webpack-plugin')
const argv = require('yargs').argv

const port = argv.port || 3000

module.exports = {
    entry: [
        'react-hot-loader/patch',
        `webpack-dev-server/client?http://localhost:${port}`,
        'webpack/hot/only-dev-server',
        './src/index'
    ],
    output: {
        filename: 'bundle.js',
        path: path.resolve(__dirname, 'dist'),
        publicPath: '/'
        // necessary for HMR to know where to load the hot update chunks
    },
    devtool: 'inline-source-map',
    plugins: [
        new HtmlWebpackPlugin({
            template: 'index.template.ejs',
            inject: 'body'
        }),
        new webpack.HotModuleReplacementPlugin(),
        new webpack.NamedModulesPlugin(),
        new webpack.NoEmitOnErrorsPlugin()
    ],
    module: {
        rules: [
            {
                test: /\.jsx?$/,
                include: path.resolve(__dirname, './src'),
                use: {
                    loader: 'babel-loader'
                },
            },
            {
                test: /\.css$/,
                include: path.resolve(__dirname, './src'),
                use: [
                    {
                        loader: 'style-loader',
                    },
                    {
                        loader: 'css-loader',
                        options: {
                            importLoader: 1,
                            modules: true,
                            localIdentName: '[path]___[name]__[local]___[hash:base64:5]'
                        }
                    },
                    {
                        loader: 'postcss-loader'
                    }
                ]
            }
        ]
    },
    devServer: {
        host: 'localhost',
        port: port,

        historyApiFallback: true,
        // respond to 404s with index.html

        hot: true,
        // enable HMR on the server
    }

}