webpack.config.js

import * as path from 'path';
import { fileURLToPath } from 'url';
import HtmlWebpackPlugin from 'html-webpack-plugin';

const isProduction = process.env.NODE_ENV === 'production';
const filename = fileURLToPath(import.meta.url);
const dirname = path.dirname(filename);

const config = {
  entry: './src/index.js',
  output: {
    filename: 'bundle.js',
    path: path.resolve(dirname, 'dist'),
  },
  mode: 'production',
  optimization: {
    usedExports: true,
  },
  devServer: {
    open: { app: { name: 'Google Chrome' } },
    host: 'localhost',
  },
  plugins: [
    new HtmlWebpackPlugin({
      template: 'index.html',
      favicon: './src/images/favicon.ico',
    }),

    // Add your plugins here
    // Learn more about plugins from https://webpack.js.org/configuration/plugins/
  ],
  module: {
    rules: [
      {
        test: /\.(eot|svg|ttf|woff|woff2|png|jpg|gif)$/i,
        type: 'asset',
      },
      {
        test: /\.css$/,
        use: ['style-loader', 'css-loader', 'postcss-loader'],
      },
      {
        test: /\.scss$/,
        use: ['style-loader', 'css-loader', 'sass-loader', 'postcss-loader'],
      },
      // Add your rules for custom modules here
      // Learn more about loaders from https://webpack.js.org/loaders/
    ],
  },
};

export default () => {
  if (isProduction) {
    config.mode = 'production';
  } else {
    config.mode = 'development';
  }
  return config;
};