webpack.common.js

const path = require('path');
const { CleanWebpackPlugin } = require('clean-webpack-plugin');
const HtmlWebpackPlugin = require('html-webpack-plugin');
const MiniCssExtractPlugin = require('mini-css-extract-plugin');

module.exports = {
  module: {
    rules: [
      {
        test: /\.css$/i,
        use: [MiniCssExtractPlugin.loader, 'css-loader']
      },
      {
        test: /\.js$/,
        use: {
          loader: 'babel-loader',
          options: {
            presets: [
              [
                '@babel/preset-env',
                {
                  targets: { chrome: '78' },
                  modules: false,
                  useBuiltIns: 'entry',
                  corejs: 2
                }
              ]
            ],
            plugins: ['@babel/plugin-syntax-dynamic-import']
          }
        }
      }
    ]
  },

  plugins: [
    // new CleanWebpackPlugin(['dist/*']) for < v2 versions of CleanWebpackPlugin
    new CleanWebpackPlugin(),
    new MiniCssExtractPlugin(),
    new HtmlWebpackPlugin({
      chunksSortMode: 'none',
      template: 'index.html',
      xhtml: 'true'
    })
  ]
};