webpack.config.js

const path = require('path')
const MiniCssExtractPlugin = require('mini-css-extract-plugin')
const HtmlWebpackPlugin = require('html-webpack-plugin')
const { CleanWebpackPlugin } = require('clean-webpack-plugin')
const ReactRefreshWebpackPlugin = require('@pmmmwh/react-refresh-webpack-plugin')

let mode = 'development'
let target = 'web'
if (process.env.NODE_ENV === 'production') {
  mode = 'production'
}
module.exports = {
  mode: mode,
  target: target,
  entry: './src/index.js',
  output: {
    path: path.resolve(__dirname, 'dist'),
    assetModuleFilename: 'images/[hash][ext][query]',
  },
  module: {
    rules: [
      {
        test: /\.(png|jpe?g|gif|svg)$/i,
        type: 'asset',
      },
      {
        test: /\.(s[ac]|c)ss$/i,
        use: [
          {
            loader: MiniCssExtractPlugin.loader,
            options: { publicPath: '' },
          },
          'css-loader',
          'postcss-loader',
          'sass-loader',
        ],
      },
      {
        test: /\.jsx?$/,
        exclude: /node_modules/,
        use: {
          loader: 'babel-loader',
          options: {
            /**
             * From the docs: When set, the given directory will be used
             * to cache the results of the loader. Future webpack builds
             * will attempt to read from the cache to avoid needing to run
             * the potentially expensive Babel recompilation process on each run.
             */
            cacheDirectory: true,
          },
        },
      },
    ],
  },
  plugins: [
    new CleanWebpackPlugin(),
    new MiniCssExtractPlugin(),
    new HtmlWebpackPlugin({
      template: './src/index.html',
    }),
    mode === 'development' && new ReactRefreshWebpackPlugin(),
  ],

  resolve: {
    extensions: ['.js', '.jsx'],
  },
  devtool: 'source-map',
  devServer: {
    static: './dist',
    hot: true,
  },
}