webpack.config.js

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

module.exports = (env) => ({
  entry: './src/index.js',
  resolve: {
    extensions: ['.js'],
    alias: {
      '@': path.resolve(__dirname, 'src/'),
      '@public': path.resolve(__dirname, 'public/'),
    },
  },
  output: {
    filename: 'bundle.js',
    path: path.resolve(__dirname, 'dist'),
    publicPath: '/',
  },
  devServer: {
    port: 9000,
    historyApiFallback: true,
  },
  plugins: [
    new HtmlWebpackPlugin({
      filename: 'index.html',
      template: path.resolve(__dirname, './public/index.html'),
    }),
  ],
  mode: env.production ? 'production' : 'development',
  module: {
    rules: [
      {
        test: /\.m?js$/,
        exclude: /node_modules/,
        use: {
          loader: 'babel-loader',
          options: {
            presets: ['@babel/preset-env'],
          },
        },
      },
      {
        test: /\.html$/i,
        use: {
          loader: 'html-loader',
          options: {
            minimize: true,
          },
        },
      },
      {
        test: /\.css$/i,
        use: ['style-loader', 'css-loader'],
      },
    ],
  },
});