webpack.config.js

// Generated using webpack-cli https://github.com/webpack/webpack-cli

const path = require('path');
const HtmlWebpackPlugin = require('html-webpack-plugin');
const MiniCssExtractPlugin = require('mini-css-extract-plugin');
const TerserPlugin = require('terser-webpack-plugin');
const CssMinimizerPlugin = require('css-minimizer-webpack-plugin');
const ESLintPlugin = require('eslint-webpack-plugin');

const isProduction = process.env.NODE_ENV === 'production';
const outputPath = path.resolve(__dirname, 'dist');
const stylesHandler = isProduction
  ? MiniCssExtractPlugin.loader
  : 'style-loader';

const config = {
  entry: './src/index.js',
  output: {
    path: outputPath,
    assetModuleFilename: 'images/[hash][ext][query]',
  },
  devServer: {
    open: true,
    host: 'localhost',
  },
  plugins: [
    new HtmlWebpackPlugin({
      template: './src/index.html',
      filename: 'index.html',
    }),
    new CssMinimizerPlugin(),
    new ESLintPlugin({
      extensions: ['.js', 'jsx', 'json'],
    }),
    // Add your plugins here
    // Learn more about plugins from https://webpack.js.org/configuration/plugins/
  ],
  module: {
    rules: [
      {
        test: /\.(js|jsx)$/i,
        exclude: /node_modules/,
        loader: 'babel-loader',
      },
      {
        test: /\.css$/i,
        use: [stylesHandler, 'css-loader'],
      },
      {
        test: /\.s[ac]ss$/i,
        use: [stylesHandler, 'css-loader', 'sass-loader'],
      },
      {
        test: /\.(eot|svg|ttf|woff|woff2|png|jpg|gif)$/i,
        type: 'asset',
      },

      // Add your rules for custom modules here
      // Learn more about loaders from https://webpack.js.org/loaders/
    ],
  },
  optimization: {
    minimize: true,
    minimizer: [
      new TerserPlugin({
        minify: TerserPlugin.uglifyJsMinify,
        terserOptions: {
          compress: {
            drop_console: true,
          },
        },
      }),
      new CssMinimizerPlugin(),
    ],
  },
};

module.exports = () => {
  if (isProduction) {
    config.mode = 'production';

    config.plugins.push(new MiniCssExtractPlugin());
  } else {
    config.mode = 'development';
  }
  return config;
};