webpack.config.js

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

/*
 * SplitChunksPlugin is enabled by default and replaced
 * deprecated CommonsChunkPlugin. It automatically identifies modules which
 * should be splitted of chunk by heuristics using module duplication count and
 * module category (i. e. node_modules). And splits the chunks…
 *
 * It is safe to remove "splitChunks" from the generated configuration
 * and was added as an educational example.
 *
 * https://webpack.js.org/plugins/split-chunks-plugin/
 *
 */

/*
 * We've enabled UglifyJSPlugin for you! This minifies your app
 * in order to load faster and run less javascript.
 *
 * https://github.com/webpack-contrib/uglifyjs-webpack-plugin
 *
 */

const UglifyJSPlugin = require('uglifyjs-webpack-plugin');

module.exports = {
  devServer: {
    contentBase: path.join(__dirname, 'dist'),
    compress: true,
    port: 9000
  },
  module: {
    rules: [
      {
        include: [path.resolve(__dirname, 'src')],
        loader: 'babel-loader',

        options: {
          plugins: ['syntax-dynamic-import'],

          presets: [
            [
              '@babel/preset-env',
              {
                modules: false
              }
            ]
          ]
        },

        test: /\.js$/
      },
      {
        test: /\.(scss|css)$/,

        use: [
          {
            loader: 'style-loader',
          },
          {
            loader: 'css-loader',
            options: {
              sourceMap: true
            }
          },
          {
            loader: 'sass-loader',
            options: {
              sourceMap: true,
            }
          }
        ]
      },
      {
        // ASSET LOADER
        test: /\.(woff|woff2|ttf|eot)$/,
        loader: 'file-loader'
      },
      {
        test: /\.(png|svg|jpg|gif)$/,
        use: [
          {
            loader: 'file-loader',
            options: {
              esModule: false,
            },
          },
        ]
      },
      {
        test: /\.(html)$/,
        use: {
            loader: 'html-loader',
            options: {
                attrs: ['img:src', 'link:href']
            }
        }
    }
    ]
  },

  output: {
    chunkFilename: '[name].[chunkhash].js',
    filename: '[name].[chunkhash].js'
  },

  mode: 'development',

  optimization: {
    splitChunks: {
      cacheGroups: {
        vendors: {
          priority: -10,
          test: /[\\/]node_modules[\\/]/
        }
      },

      chunks: 'async',
      minChunks: 1,
      minSize: 30000,
      name: true
    }
  },
  plugins: [
    new HtmlWebpackPlugin({
      inject: true,
      template: 'src/index.html'
    }),
  ]
};