webpack.config.js

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

const path = require('path');

const mode = process.env.NODE_ENV || 'development';
const devMode = mode === 'development';
const target = devMode ? 'web' : 'browserslist';
const devtool = devMode ? 'source-map' : undefined;

module.exports = {
  mode,
  target,
  devtool,
  devServer: {
    port: 3000,
    open: true,
    hot: true,
  },
  entry: path.resolve(__dirname, 'src', 'index.js'),
  // entry: ['@babel/polyfill', path.resolve(__dirname, 'src', 'index.js')], // if you need to use Babel polyfill
  output: {
    path: path.resolve(__dirname, 'dist'),
    clean: true,
    filename: 'app.[contenthash].js',
  },
  plugins: [
    new HtmlWebpackPlugin({
      template: path.resolve(__dirname, 'src', 'index.html')
    }),
    new MiniCssExtractPlugin({
      filename: 'main.[contenthash].css',
    }),
  ],
  module: {
    rules: [
      {
        test: /\.html$/i,
        loader: 'html-loader',
      },
      {
        test: /\.(c|sa|sc)ss$/i,
        use: [
          devMode ? 'style-loader' : MiniCssExtractPlugin.loader,
          'css-loader',
          'postcss-loader',
          'sass-loader',
        ],
      },
      {
        test: /\.woff2?$/i,
        type: 'asset/resource',
        generator: {
          filename: 'fonts/[name][ext]'
        }
      },
      {
        test: /\.(jpe?g|png|webp|gif|svg)$/i,
        use: {
          loader: 'image-webpack-loader',
          options: {
            mozjpeg: {
              progressive: true,
            },
            // optipng.enabled: false will disable optipng
            optipng: {
              enabled: false,
            },
            pngquant: {
              quality: [0.65, 0.90],
              speed: 4
            },
            gifsicle: {
              interlaced: false,
            },
            // the webp option will enable WEBP
            webp: {
              quality: 75
            }
          }
        },
        type: 'asset/resource',
        generator: {
          filename: 'img/[hash][ext]'
        }
      },
      {
        test: /\.m?js$/i,
        exclude: /(node_modules|bower_components)/,
        use: {
          loader: 'babel-loader',
          options: {
            presets: ['@babel/preset-env']
          }
        }
      }
    ],
  },
}