webpack.common.js

const path = require('path');
const HtmlWebpackPlugin = require('html-webpack-plugin');
const MiniCssExtractPlugin = require('mini-css-extract-plugin');
const OptimizeCssAssetsPlugin = require('optimize-css-assets-webpack-plugin');
const TerserJsPlugin = require('terser-webpack-plugin');

/**
 * @type { import('webpack').Configuration }
 */
const config = {
  entry: {
    babel: '@babel/polyfill',
    app: './src/index.js',
  },
  optimization: {
    minimizer: [new TerserJsPlugin({}), new OptimizeCssAssetsPlugin({})]
  },
  plugins: [
    new HtmlWebpackPlugin({
      filename: './index.html',
      template: './src/index.html'
    }),
    new MiniCssExtractPlugin({
      filename: '[name].[chunkhash].css',
      chunkFilename: '[id].css'
    })
  ],
  output: {
    filename: '[name].[chunkhash].bundle.js',
    // eslint-disable-next-line no-undef
    path: path.resolve(__dirname, 'dist'),
  },
  module: {
    rules: [
      {
        test: /\.scss$/,
        use: [MiniCssExtractPlugin.loader, 'css-loader', 'sass-loader']
      },
      {
        test: /\.html$/,
        use: [{
          loader: 'html-loader',
          options: { minimize: true }
        }]
      },
      {
        test: /\.js$/,
        exclude: '/node_modules/',
        use: {
          loader: 'babel-loader'
        }
      },
      {
        test: /\.(png|svg|jpg|gif)$/,
        use: {
          loader: 'file-loader',
          options: {
            outputPath: './images'
          }
        }
      }
    ]
  }
};

module.exports = config;