webpack.config.js

const UglifyJsPlugin = require('uglifyjs-webpack-plugin');
const MiniCssExtractPlugin = require('mini-css-extract-plugin');
const HtmlWebpackPlugin = require('html-webpack-plugin');
const path = require('path');

function generateHtmls(pageNames = []) {
  const htmls = [];

  pageNames.forEach((name) => {
    htmls.push(
      new HtmlWebpackPlugin({
        template: './src/tpl.html',
        filename: `./views/${name}.html`,
        chunks: [ `${name}`, 'vendors' ]
      })
    );
  });

  return htmls;
}

module.exports = {
  mode: 'development',
  entry: {
    page1: './src/page1/index.js',
    page2: './src/page2/index.js'
  },
  output: {
    path: __dirname + '/dist',
    filename: 'js/[name].js'
  },
  module: {
    rules: [
      {
        test: /\.js$/,
        exclude: /node_modules/,
        use: {
          loader: 'babel-loader',
          options: {
            presets: [
              [
                '@babel/preset-env',
                {
                  loose: true,
                  modules: 'commonjs',
                  useBuiltIns: 'entry'
                }
              ]
            ]
          }
        }
      },
      {
        test: /\.css$/,
        use: [
          {
            loader: MiniCssExtractPlugin.loader,
            options: {
              // you can specify a publicPath here
              // by default it uses publicPath in webpackOptions.output
              publicPath: '../',
              hmr: process.env.NODE_ENV === 'development'
            }
          },
          'css-loader'
        ]
      },
      {
        test: /\.(png|svg|jpg|gif)$/,
        use: [
          {
            loader: 'url-loader',
            options: {
              outputPath: 'img',
              limit: 1
            }
          }
        ]
      }
    ]
  },
  plugins: [
    new MiniCssExtractPlugin({
      // Options similar to the same options in webpackOptions.output
      // both options are optional
      filename: 'css/[name].css',
      chunkFilename: 'css/[id].css'
    }),
    ...generateHtmls([ 'page1', 'page2' ])
  ],
  externals: {
    jquery: 'window.jQuery'
  },
  optimization: {
    splitChunks: {
      chunks: 'all'
    },
    minimizer: [
      new UglifyJsPlugin({
        uglifyOptions: {
          ie8: true
        }
      })
    ]
  },
  devServer: {
    contentBase: path.join(__dirname, 'dist'),
    compress: true,
    port: 8080,
    writeToDisk: true
  }
};