webpack.config.js

const path = require('path')
const htmlWebpackPlugin = require('html-webpack-plugin')
const TerserPlugin = require('terser-webpack-plugin')
const CssMinimizerPlugin = require('css-minimizer-webpack-plugin')
const Dotenv = require('dotenv-webpack')

module.exports = {
  mode: 'development',
  entry: {
    index: './src/index.js',
    login: './src/login/login.js',
    register: './src/register/register.js'
  },
  devtool: 'inline-source-map',
  devServer: {
    contentBase: './dist'
  },
  plugins: [
    new htmlWebpackPlugin({
      template: './src/index.html',
      inject: true,
      chunks: ['index'],
      filename: 'index.html'
    }),
    new htmlWebpackPlugin({
      template: './src/login/login.html',
      inject: true,
      chunks: ['login'],
      filename: 'login.html'
    }),
    new htmlWebpackPlugin({
      template: './src/register/register.html',
      inject: true,
      chunks: ['register'],
      filename: 'register.html'
    }),
    new Dotenv()
  ],
  output: {
    filename: '[name].[contenthash].js',
    path: path.resolve(__dirname, 'dist'),
    clean: true,
    publicPath: '/'
  },
  module: {
    rules: [
      {
        test: /\.(html)$/,
        use: ['html-loader']
      },
      {
        test: /\.css/i,
        use: ['style-loader', 'css-loader']
      },
      {
        test: /\.(png|svg|jpg|jpeg|gif)$/i,
        type: 'asset/resource'
      },
      {
        test: /\.js$/,
        exclude: /node_modules/,
        loader: 'babel-loader',
        options: {
          presets: ['@babel/preset-env']
        }
      },
      {
        test: /\.s[ac]ss$/i,
        use: [
          "style-loader",
          "css-loader",
          "sass-loader"
        ],
      }
    ]
  },
  optimization: {
    minimize: true,
    minimizer: [
      new TerserPlugin({
        test: /\.js(\?.*)?$/i,
        parallel: true
      }),
      new CssMinimizerPlugin()
    ]
  }
}