___webpack.config.js

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

module.exports = {
  entry: './playground/index.js',

  devServer: {
    contentBase: './dist',
    hot: true,
  },

  mode: 'development',

  module: {
    rules: [
      {
        test: /\.js$/,
        exclude: /node_modules/,
        use: {
          loader: 'babel-loader',
          options: {
            plugins: ['react-hot-loader/babel'],
          },
        },
      },
    ],
  },

  output: {
    path: path.resolve(__dirname, './dist'),
    filename: 'bundle.js',
  },

  plugins: [
    new HtmlWebpackPlugin(),
    new webpack.NamedModulesPlugin(),
    new webpack.HotModuleReplacementPlugin(),
  ],
}