webpack.config.js

const path = require('path')
const Dotenv = require('dotenv-webpack')
const CopyWebpackPlugin = require('copy-webpack-plugin')
const HtmlWebpackPlugin = require('html-webpack-plugin')
const WorkboxWebpackPlugin = require('workbox-webpack-plugin')
const BundleAnalyzerPlugin = require('webpack-bundle-analyzer').BundleAnalyzerPlugin

module.exports = (_, argv) => ({
  entry: {
    bundle: path.join(__dirname, 'src', 'index.tsx')
  },
  output: {
    filename: '[name]-[hash].js',
    path: path.join(__dirname, 'dist'),
    publicPath: '/'
  },
  optimization: {
    splitChunks: {
      chunks: 'all'
    }
  },
  devServer: {
    static: {
      directory: path.join(__dirname, 'dist')
    },
    historyApiFallback: true
  },
  watchOptions: {
    ignored: /node_modules/
  },
  module: {
    rules: [
      {
        test: /\.tsx?$/,
        loader: 'esbuild-loader',
        options: {
          target: 'esnext',
          loader: 'tsx'
        },
        exclude: /node_modules/
      }
    ]
  },
  plugins: [
    new Dotenv(),
    new CopyWebpackPlugin({
      patterns: [
        {
          from: path.join(__dirname, 'assets'),
          to: path.join(__dirname, 'dist', 'assets')
        }
      ]
    }),
    new HtmlWebpackPlugin({
      template: path.join(__dirname, 'src', 'index.html'),
      scriptLoading: 'defer'
    }),
    ...(argv.mode === 'production'
      ? [
          new WorkboxWebpackPlugin.InjectManifest({
            swSrc: path.join(__dirname, 'src', 'sw', 'fcm-sw.ts'),
            swDest: 'fcm-sw.js'
          })
        ]
      : []),
    ...(argv.analyze ? [new BundleAnalyzerPlugin()] : [])
  ],
  resolve: {
    extensions: ['.js', '.ts', '.tsx'],
    alias: { '@': path.join(__dirname, 'src') }
  },
  devtool: argv.mode === 'development' ? 'inline-source-map' : false
})