webpack.config.js

const path = require('path');
const HtmlWebpackPlugin = require('html-webpack-plugin');
const MiniCssExtractPlugin = require('mini-css-extract-plugin');
const { CleanWebpackPlugin } = require('clean-webpack-plugin');

module.exports = (env, argv) => ({
  mode: 'development',
  devServer: { static: './dist' },
  entry: './src/index.js',
  output: {
    filename: 'main.js',
    path: path.resolve(__dirname, 'dist'),
    clean: { keep: /\.git/ },
    assetModuleFilename: 'assets/[hash][ext][query]',
    publicPath: '/',
  },
  module: {
    rules: [
      {
        test: /\.html$/,
        use: [
          {
            loader: 'html-loader',
            options: { minimize: true },
          },
        ],
      },
      { test: /\.js$/, loader: 'babel-loader' },
      {
        test: /\.css$/i,
        exclude: /\.module\.css$/i,
        use: [
          argv.mode === 'production'
            ? MiniCssExtractPlugin.loader
            : 'style-loader',
          'css-loader',
          'postcss-loader',
        ],
      },
      {
        test: /\.module\.css$/i,
        use: [
          argv.mode === 'production'
            ? MiniCssExtractPlugin.loader
            : 'style-loader',
          {
            loader: 'css-loader',
            options: {
              modules: true,
            },
          },
          'postcss-loader',
        ],
      },
      {
        test: /\.(png|jpg|jpeg|gif)$/i,
        type: 'file-loader',
      },
    ],
  },
  plugins: [
    new CleanWebpackPlugin(),
    new HtmlWebpackPlugin({ template: './index.html' }),
    new MiniCssExtractPlugin({
      filename: 'assets/css/[name].[contenthash:8].css',
      chunkFilename: 'assets/css/[name].[contenthash:8].chunk.css',
    }),
  ],
});