├── .gitignore
├── README.md
├── frontend-performance.gif
├── package.json
├── public
    ├── favicon.ico
    ├── index.html
    ├── logo192.png
    ├── logo512.png
    ├── manifest.json
    └── robots.txt
├── src
    ├── App.css
    ├── App.js
    ├── App.test.js
    ├── components
    │   ├── AdvancedFeatures.js
    │   ├── Dashboard.js
    │   ├── Home.js
    │   ├── PreFetchLink.js
    │   ├── Profile.js
    │   ├── Settings.js
    │   └── advanced
    │   │   ├── DataVisualization.js
    │   │   └── MachineLearning.js
    ├── index.css
    ├── index.js
    ├── logo.svg
    ├── reportWebVitals.js
    └── setupTests.js
├── webpack.config.js
└── yarn.lock


/.gitignore:
--------------------------------------------------------------------------------
 1 | # See https://help.github.com/articles/ignoring-files/ for more about ignoring files.
 2 | 
 3 | # dependencies
 4 | /node_modules
 5 | /.pnp
 6 | .pnp.js
 7 | 
 8 | # testing
 9 | /coverage
10 | 
11 | # production
12 | /build
13 | /dist
14 | 
15 | # misc
16 | .DS_Store
17 | .env.local
18 | .env.development.local
19 | .env.test.local
20 | .env.production.local
21 | 
22 | npm-debug.log*
23 | yarn-debug.log*
24 | yarn-error.log*
25 | 
26 | # IntelliJ
27 | /.idea


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/README.md:
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 1 | # 프론트엔드 성능 최적화 데모
 2 | 
 3 | 이 저장소는 React 기반 프론트엔드 애플리케이션의 성능 최적화를 시연하기 위해 만들어졌습니다. 다양한 최적화 기법을 적용하여 애플리케이션의 성능을 향상시키는 방법을 각 커밋을 통해 확인해보세요.
 4 | 
 5 | - 적용된 기법
 6 |   - 동적 라우팅을 이용한 코드 분할(Code Splitting with Dynamic Routing)
 7 |     - 커밋: [a789455](https://github.com/Violet-Bora-Lee/react-code-package-level-optimization/commit/a7894559217e086941c8edff3d92c34b30271eb2)
 8 |   - `package.json` 최적화(`dependencies`, `devDependencies`)
 9 |     - 커밋: [ef2950d](https://github.com/Violet-Bora-Lee/react-code-package-level-optimization/commit/ef2950de888129d9a6b337b0f6167ed89fe2a93c)
10 |   - 트리쉐이킹(Use tree shaking by importing only necessary code)
11 |     - 커밋: [1df2740](https://github.com/Violet-Bora-Lee/react-code-package-level-optimization/commit/1df274004acc9d7356e23e4c813639fd74f1d285)
12 |   - 웹팩 설정으로 JS 파일 압축하기(Webpack configuration for advanced JS minification)
13 |     - 커밋: [7dac277](https://github.com/Violet-Bora-Lee/react-code-package-level-optimization/commit/7dac2771b902b5017e416f9ced44b4f827a9aa5d)
14 |   - 다양한 프리페칭 전략(Implement pre-fetching strategies)
15 |     - 커밋: [f838d69](https://github.com/Violet-Bora-Lee/react-code-package-level-optimization/commit/f838d696501d00e695c040542f8cde26d8a2989b)
16 | 
17 | ![프론트엔드_성능_최적화](https://github.com/Violet-Bora-Lee/react-code-package-level-optimization/blob/3487dae54668cc07951f6796037104fcdde21d00/frontend-performance.gif)
18 | 
19 | ## 시작하기
20 | 
21 | 이 프로젝트는 [Create React App](https://github.com/facebook/create-react-app)으로 부트스트랩되었습니다.
22 | 
23 | ### 필수 조건
24 | 
25 | - Node.js (>= 14.x)
26 | - npm (>= 6.x) 또는 yarn (>= 1.x)
27 | 
28 | ### 설치
29 | 
30 | 프로젝트를 클론하고 필요한 패키지를 설치합니다.
31 | 
32 | ```sh
33 | git clone https://github.com/Violet-Bora-Lee/react-code-package-level-optimization.git
34 | cd react-code-package-level-optimization
35 | npm install (또는 yarn install)
36 | ```
37 | 
38 | ### 실행
39 | 
40 | ```sh
41 | npm start (또는 yarn start)
42 | ```
43 | 
44 | ### 분석 방법
45 | ```sh
46 | npm run build:analyze (또는 yarn run build:analyze)
47 | ```
48 | 


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/frontend-performance.gif:
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https://raw.githubusercontent.com/Violet-Bora-Lee/react-code-package-level-optimization/182a2a6c7a1e4d4ff1421849de11fad9ee6e406b/frontend-performance.gif


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/package.json:
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 1 | {
 2 |   "name": "code-splitting-demo",
 3 |   "version": "1.0.0",
 4 |   "description": "Frontend Performance Optimalization Demo",
 5 |   "author": "Bora Lee with Claude",
 6 |   "dependencies": {
 7 |     "chart.js": "^4.3.0",
 8 |     "react": "^18.2.0",
 9 |     "react-chartjs-2": "^5.2.0",
10 |     "react-dom": "^18.2.0",
11 |     "react-router-dom": "^6.11.2"
12 |   },
13 |   "devDependencies": {
14 |     "@babel/core": "^7.22.1",
15 |     "@babel/preset-env": "^7.22.4",
16 |     "@babel/preset-react": "^7.22.3",
17 |     "babel-loader": "^9.1.3",
18 |     "css-loader": "^7.1.2",
19 |     "css-minimizer-webpack-plugin": "^7.0.0",
20 |     "html-webpack-plugin": "^5.5.0",
21 |     "style-loader": "^4.0.0",
22 |     "terser-webpack-plugin": "^5.3.10",
23 |     "webpack": "^5.84.1",
24 |     "webpack-bundle-analyzer": "^4.9.0",
25 |     "webpack-cli": "^5.1.1",
26 |     "webpack-dev-server": "^4.15.0"
27 |   },
28 |   "scripts": {
29 |     "start": "webpack serve --mode development",
30 |     "build": "webpack --mode production",
31 |     "build:analyze": "webpack --mode production --env analyze"
32 |   },
33 |   "browserslist": {
34 |     "production": [
35 |       ">0.2%",
36 |       "not dead",
37 |       "not op_mini all"
38 |     ],
39 |     "development": [
40 |       "last 1 chrome version",
41 |       "last 1 firefox version",
42 |       "last 1 safari version"
43 |     ]
44 |   }
45 | }
46 | 


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/public/favicon.ico:
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https://raw.githubusercontent.com/Violet-Bora-Lee/react-code-package-level-optimization/182a2a6c7a1e4d4ff1421849de11fad9ee6e406b/public/favicon.ico


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/public/index.html:
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 1 | <!DOCTYPE html>
 2 | <html lang="en">
 3 |   <head>
 4 |     <meta charset="utf-8" />
 5 |     <meta name="viewport" content="width=device-width, initial-scale=1" />
 6 |     <title>Code Splitting Demo</title>
 7 |   </head>
 8 |   <body>
 9 |     <noscript>You need to enable JavaScript to run this app.</noscript>
10 |     <div id="root"></div>
11 |   </body>
12 | </html>


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/public/logo192.png:
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https://raw.githubusercontent.com/Violet-Bora-Lee/react-code-package-level-optimization/182a2a6c7a1e4d4ff1421849de11fad9ee6e406b/public/logo192.png


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/public/logo512.png:
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https://raw.githubusercontent.com/Violet-Bora-Lee/react-code-package-level-optimization/182a2a6c7a1e4d4ff1421849de11fad9ee6e406b/public/logo512.png


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/public/manifest.json:
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 1 | {
 2 |   "short_name": "React App",
 3 |   "name": "Create React App Sample",
 4 |   "icons": [
 5 |     {
 6 |       "src": "favicon.ico",
 7 |       "sizes": "64x64 32x32 24x24 16x16",
 8 |       "type": "image/x-icon"
 9 |     },
10 |     {
11 |       "src": "logo192.png",
12 |       "type": "image/png",
13 |       "sizes": "192x192"
14 |     },
15 |     {
16 |       "src": "logo512.png",
17 |       "type": "image/png",
18 |       "sizes": "512x512"
19 |     }
20 |   ],
21 |   "start_url": ".",
22 |   "display": "standalone",
23 |   "theme_color": "#000000",
24 |   "background_color": "#ffffff"
25 | }
26 | 


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/public/robots.txt:
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1 | # https://www.robotstxt.org/robotstxt.html
2 | User-agent: *
3 | Disallow:
4 | 


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/src/App.css:
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 1 | .App {
 2 |   text-align: center;
 3 | }
 4 | 
 5 | .App-logo {
 6 |   height: 40vmin;
 7 |   pointer-events: none;
 8 | }
 9 | 
10 | @media (prefers-reduced-motion: no-preference) {
11 |   .App-logo {
12 |     animation: App-logo-spin infinite 20s linear;
13 |   }
14 | }
15 | 
16 | .App-header {
17 |   background-color: #282c34;
18 |   min-height: 100vh;
19 |   display: flex;
20 |   flex-direction: column;
21 |   align-items: center;
22 |   justify-content: center;
23 |   font-size: calc(10px + 2vmin);
24 |   color: white;
25 | }
26 | 
27 | .App-link {
28 |   color: #61dafb;
29 | }
30 | 
31 | @keyframes App-logo-spin {
32 |   from {
33 |     transform: rotate(0deg);
34 |   }
35 |   to {
36 |     transform: rotate(360deg);
37 |   }
38 | }
39 | 


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/src/App.js:
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 1 | // App.js
 2 | import React, { Suspense, lazy } from 'react';
 3 | import { BrowserRouter as Router, Route, Link, Routes } from 'react-router-dom';
 4 | import PreFetchLink from './components/PreFetchLink';
 5 | 
 6 | const Home = lazy(() => import(/* webpackPrefetch: true */ './components/Home'));
 7 | const Dashboard = lazy(() => import(/* webpackPrefetch: true */ './components/Dashboard'));
 8 | const Profile = lazy(() => import('./components/Profile'));
 9 | const Settings = lazy(() => import('./components/Settings'));
10 | const AdvancedFeatures = lazy(() => import('./components/AdvancedFeatures'));
11 | 
12 | 
13 | function App() {
14 |   return (
15 |     <Router>
16 |       <div>
17 |         <nav>
18 |           <ul>
19 |             <li>
20 |               <PreFetchLink
21 |                 to="/"
22 |                 prefetch={() => import('./components/Home')}>
23 |                 Home
24 |               </PreFetchLink>
25 |             </li>
26 |             <li>
27 |               <PreFetchLink
28 |                 to="/dashboard"
29 |                 prefetch={() => import('./components/Dashboard')}>
30 |                 Dashboard
31 |               </PreFetchLink>
32 |             </li>
33 |             <li>
34 |               <PreFetchLink
35 |                 to="/profile"
36 |                 prefetch={() => import('./components/Profile')}>
37 |                 Profile
38 |               </PreFetchLink>
39 |             </li>
40 |             <li>
41 |               <PreFetchLink
42 |                 to="/settings"
43 |                 prefetch={() => import('./components/Settings')}>
44 |                 Settings
45 |               </PreFetchLink>
46 |             </li>
47 |             <li>
48 |               <PreFetchLink
49 |                 to="/advanced" p
50 |                 refetch={() => import('./components/AdvancedFeatures')}>
51 |                 Advanced Features
52 |               </PreFetchLink>
53 |             </li>
54 |           </ul>
55 |         </nav>
56 | 
57 |         <Suspense fallback={<div>Loading...</div>}>
58 |           <Routes>
59 |             <Route path="/" element={<Home />} />
60 |             <Route path="/dashboard" element={<Dashboard />} />
61 |             <Route path="/profile" element={<Profile />} />
62 |             <Route path="/settings" element={<Settings />} />
63 |             <Route path="/advanced" element={<AdvancedFeatures />} />
64 |           </Routes>
65 |         </Suspense>
66 |       </div>
67 |     </Router>
68 |   );
69 | }
70 | 
71 | export default App;
72 | 


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/src/App.test.js:
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1 | import { render, screen } from '@testing-library/react';
2 | import App from './App';
3 | 
4 | test('renders learn react link', () => {
5 |   render(<App />);
6 |   const linkElement = screen.getByText(/learn react/i);
7 |   expect(linkElement).toBeInTheDocument();
8 | });
9 | 


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/src/components/AdvancedFeatures.js:
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 1 | import React, { useState, Suspense, lazy } from 'react';
 2 | 
 3 | const DataVisualization = lazy(() => import('./advanced/DataVisualization'));
 4 | const MachineLearning = lazy(() => import('./advanced/MachineLearning'));
 5 | 
 6 | function AdvancedFeatures() {
 7 |   const [activeFeature, setActiveFeature] = useState(null);
 8 | 
 9 |   return (
10 |     <div>
11 |       <h2>Advanced Features</h2>
12 |       <button onClick={() => setActiveFeature('dataViz')}>Data Visualization</button>
13 |       <button onClick={() => setActiveFeature('ml')}>Machine Learning</button>
14 | 
15 |       <Suspense fallback={<div>Loading feature...</div>}>
16 |         {activeFeature === 'dataViz' && <DataVisualization />}
17 |         {activeFeature === 'ml' && <MachineLearning />}
18 |       </Suspense>
19 |     </div>
20 |   );
21 | }
22 | 
23 | export default AdvancedFeatures;


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/src/components/Dashboard.js:
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 1 | import React, { useState } from 'react';
 2 | 
 3 | function Dashboard() {
 4 |   const [count, setCount] = useState(0);
 5 | 
 6 |   return (
 7 |     <div>
 8 |       <h2>Dashboard</h2>
 9 |       <p>You clicked {count} times</p>
10 |       <button onClick={() => setCount(count + 1)}>
11 |         Click me
12 |       </button>
13 |     </div>
14 |   );
15 | }
16 | 
17 | export default Dashboard;
18 | 


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/src/components/Home.js:
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1 | import React from 'react';
2 | 
3 | function Home() {
4 |   return <h2>Home</h2>;
5 | }
6 | 
7 | export default Home;


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/src/components/PreFetchLink.js:
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 1 | // components/PreFetchLink.js
 2 | import React from 'react';
 3 | import { Link } from 'react-router-dom';
 4 | 
 5 | const PreFetchLink = ({ to, children, prefetch }) => {
 6 |   const prefetchComponent = () => {
 7 |     if (prefetch) {
 8 |       prefetch();
 9 |     }
10 |   };
11 | 
12 |   return (
13 |     <Link to={to} onMouseEnter={prefetchComponent} onFocus={prefetchComponent}>
14 |       {children}
15 |     </Link>
16 |   );
17 | };
18 | 
19 | export default PreFetchLink;


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/src/components/Profile.js:
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1 | import React from 'react';
2 | 
3 | function Profile() {
4 |   return <h2>Profile</h2>;
5 | }
6 | 
7 | export default Profile;
8 | 


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/src/components/Settings.js:
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1 | import React from 'react';
2 | 
3 | function Settings() {
4 |   return <h2>Settings</h2>;
5 | }
6 | 
7 | export default Settings;
8 | 


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/src/components/advanced/DataVisualization.js:
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 1 | import React, { useState, useEffect } from 'react';
 2 | 
 3 | function DataVisualization() {
 4 |   const [ChartComponent, setChartComponent] = useState(null);
 5 | 
 6 |   useEffect(() => {
 7 |     const loadChart = async () => {
 8 |       const { Chart, BarController, CategoryScale, LinearScale, BarElement } = await import('chart.js');
 9 |       Chart.register(BarController, CategoryScale, LinearScale, BarElement);
10 |       const { Bar } = await import('react-chartjs-2');
11 |       setChartComponent(() => Bar);
12 |     };
13 | 
14 |     loadChart();
15 |   }, []);
16 | 
17 |   const data = {
18 |     labels: ['Red', 'Blue', 'Yellow', 'Green', 'Purple', 'Orange'],
19 |     datasets: [{
20 |       label: '# of Votes',
21 |       data: [12, 19, 3, 5, 2, 3],
22 |       backgroundColor: 'rgba(75, 192, 192, 0.2)',
23 |       borderColor: 'rgba(75, 192, 192, 1)',
24 |       borderWidth: 1
25 |     }]
26 |   };
27 | 
28 |   const options = {
29 |     scales: {
30 |       y: {
31 |         beginAtZero: true
32 |       }
33 |     }
34 |   };
35 | 
36 |   return (
37 |     <div>
38 |       <h2>Data Visualization</h2>
39 |       {ChartComponent && <ChartComponent data={data} options={options} />}
40 |     </div>
41 |   );
42 | }
43 | 
44 | export default DataVisualization;


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/src/components/advanced/MachineLearning.js:
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1 | import React from 'react';
2 | 
3 | function MachineLearning() {
4 |   return <h3>Machine Learning Component</h3>;
5 | }
6 | 
7 | export default MachineLearning;


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/src/index.css:
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 1 | body {
 2 |   margin: 0;
 3 |   font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen',
 4 |     'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue',
 5 |     sans-serif;
 6 |   -webkit-font-smoothing: antialiased;
 7 |   -moz-osx-font-smoothing: grayscale;
 8 | }
 9 | 
10 | code {
11 |   font-family: source-code-pro, Menlo, Monaco, Consolas, 'Courier New',
12 |     monospace;
13 | }
14 | 


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/src/index.js:
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 1 | import React from 'react';
 2 | import { createRoot } from 'react-dom/client';
 3 | import App from './App';
 4 | 
 5 | const container = document.getElementById('root');
 6 | const root = createRoot(container);
 7 | root.render(
 8 |   <React.StrictMode>
 9 |     <App />
10 |   </React.StrictMode>
11 | );


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/src/logo.svg:
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1 | <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 841.9 595.3"><g fill="#61DAFB"><path d="M666.3 296.5c0-32.5-40.7-63.3-103.1-82.4 14.4-63.6 8-114.2-20.2-130.4-6.5-3.8-14.1-5.6-22.4-5.6v22.3c4.6 0 8.3.9 11.4 2.6 13.6 7.8 19.5 37.5 14.9 75.7-1.1 9.4-2.9 19.3-5.1 29.4-19.6-4.8-41-8.5-63.5-10.9-13.5-18.5-27.5-35.3-41.6-50 32.6-30.3 63.2-46.9 84-46.9V78c-27.5 0-63.5 19.6-99.9 53.6-36.4-33.8-72.4-53.2-99.9-53.2v22.3c20.7 0 51.4 16.5 84 46.6-14 14.7-28 31.4-41.3 49.9-22.6 2.4-44 6.1-63.6 11-2.3-10-4-19.7-5.2-29-4.7-38.2 1.1-67.9 14.6-75.8 3-1.8 6.9-2.6 11.5-2.6V78.5c-8.4 0-16 1.8-22.6 5.6-28.1 16.2-34.4 66.7-19.9 130.1-62.2 19.2-102.7 49.9-102.7 82.3 0 32.5 40.7 63.3 103.1 82.4-14.4 63.6-8 114.2 20.2 130.4 6.5 3.8 14.1 5.6 22.5 5.6 27.5 0 63.5-19.6 99.9-53.6 36.4 33.8 72.4 53.2 99.9 53.2 8.4 0 16-1.8 22.6-5.6 28.1-16.2 34.4-66.7 19.9-130.1 62-19.1 102.5-49.9 102.5-82.3zm-130.2-66.7c-3.7 12.9-8.3 26.2-13.5 39.5-4.1-8-8.4-16-13.1-24-4.6-8-9.5-15.8-14.4-23.4 14.2 2.1 27.9 4.7 41 7.9zm-45.8 106.5c-7.8 13.5-15.8 26.3-24.1 38.2-14.9 1.3-30 2-45.2 2-15.1 0-30.2-.7-45-1.9-8.3-11.9-16.4-24.6-24.2-38-7.6-13.1-14.5-26.4-20.8-39.8 6.2-13.4 13.2-26.8 20.7-39.9 7.8-13.5 15.8-26.3 24.1-38.2 14.9-1.3 30-2 45.2-2 15.1 0 30.2.7 45 1.9 8.3 11.9 16.4 24.6 24.2 38 7.6 13.1 14.5 26.4 20.8 39.8-6.3 13.4-13.2 26.8-20.7 39.9zm32.3-13c5.4 13.4 10 26.8 13.8 39.8-13.1 3.2-26.9 5.9-41.2 8 4.9-7.7 9.8-15.6 14.4-23.7 4.6-8 8.9-16.1 13-24.1zM421.2 430c-9.3-9.6-18.6-20.3-27.8-32 9 .4 18.2.7 27.5.7 9.4 0 18.7-.2 27.8-.7-9 11.7-18.3 22.4-27.5 32zm-74.4-58.9c-14.2-2.1-27.9-4.7-41-7.9 3.7-12.9 8.3-26.2 13.5-39.5 4.1 8 8.4 16 13.1 24 4.7 8 9.5 15.8 14.4 23.4zM420.7 163c9.3 9.6 18.6 20.3 27.8 32-9-.4-18.2-.7-27.5-.7-9.4 0-18.7.2-27.8.7 9-11.7 18.3-22.4 27.5-32zm-74 58.9c-4.9 7.7-9.8 15.6-14.4 23.7-4.6 8-8.9 16-13 24-5.4-13.4-10-26.8-13.8-39.8 13.1-3.1 26.9-5.8 41.2-7.9zm-90.5 125.2c-35.4-15.1-58.3-34.9-58.3-50.6 0-15.7 22.9-35.6 58.3-50.6 8.6-3.7 18-7 27.7-10.1 5.7 19.6 13.2 40 22.5 60.9-9.2 20.8-16.6 41.1-22.2 60.6-9.9-3.1-19.3-6.5-28-10.2zM310 490c-13.6-7.8-19.5-37.5-14.9-75.7 1.1-9.4 2.9-19.3 5.1-29.4 19.6 4.8 41 8.5 63.5 10.9 13.5 18.5 27.5 35.3 41.6 50-32.6 30.3-63.2 46.9-84 46.9-4.5-.1-8.3-1-11.3-2.7zm237.2-76.2c4.7 38.2-1.1 67.9-14.6 75.8-3 1.8-6.9 2.6-11.5 2.6-20.7 0-51.4-16.5-84-46.6 14-14.7 28-31.4 41.3-49.9 22.6-2.4 44-6.1 63.6-11 2.3 10.1 4.1 19.8 5.2 29.1zm38.5-66.7c-8.6 3.7-18 7-27.7 10.1-5.7-19.6-13.2-40-22.5-60.9 9.2-20.8 16.6-41.1 22.2-60.6 9.9 3.1 19.3 6.5 28.1 10.2 35.4 15.1 58.3 34.9 58.3 50.6-.1 15.7-23 35.6-58.4 50.6zM320.8 78.4z"/><circle cx="420.9" cy="296.5" r="45.7"/><path d="M520.5 78.1z"/></g></svg>


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/src/reportWebVitals.js:
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 1 | const reportWebVitals = onPerfEntry => {
 2 |   if (onPerfEntry && onPerfEntry instanceof Function) {
 3 |     import('web-vitals').then(({ getCLS, getFID, getFCP, getLCP, getTTFB }) => {
 4 |       getCLS(onPerfEntry);
 5 |       getFID(onPerfEntry);
 6 |       getFCP(onPerfEntry);
 7 |       getLCP(onPerfEntry);
 8 |       getTTFB(onPerfEntry);
 9 |     });
10 |   }
11 | };
12 | 
13 | export default reportWebVitals;
14 | 


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/src/setupTests.js:
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1 | // jest-dom adds custom jest matchers for asserting on DOM nodes.
2 | // allows you to do things like:
3 | // expect(element).toHaveTextContent(/react/i)
4 | // learn more: https://github.com/testing-library/jest-dom
5 | import '@testing-library/jest-dom';
6 | 


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/webpack.config.js:
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 1 | const path = require('path');
 2 | const HtmlWebpackPlugin = require('html-webpack-plugin');
 3 | const BundleAnalyzerPlugin = require('webpack-bundle-analyzer').BundleAnalyzerPlugin;
 4 | const TerserPlugin = require('terser-webpack-plugin');
 5 | const CssMinimizerPlugin = require('css-minimizer-webpack-plugin');
 6 | 
 7 | module.exports = (env, argv) => {
 8 |   const isProduction = argv.mode === 'production';
 9 | 
10 |   const config = {
11 |     entry: './src/index.js',
12 |     output: {
13 |       path: path.resolve(__dirname, 'dist'),
14 |       filename: '[name].[contenthash].js',
15 |       clean: true,
16 |       publicPath: '/',
17 |     },
18 |     module: {
19 |       rules: [
20 |         {
21 |           test: /\.(js|jsx)$/,
22 |           exclude: /node_modules/,
23 |           use: {
24 |             loader: 'babel-loader',
25 |             options: {
26 |               presets: ['@babel/preset-env', '@babel/preset-react']
27 |             }
28 |           }
29 |         },
30 |         // CSS 규칙 추가 (만약 CSS 파일을 사용한다면)
31 |         {
32 |           test: /\.css$/,
33 |           use: ['style-loader', 'css-loader'],
34 |         },
35 |       ]
36 |     },
37 |     optimization: {
38 |       minimize: isProduction,
39 |       minimizer: [
40 |         new TerserPlugin({
41 |           terserOptions: {
42 |             parse: {
43 |               ecma: 8,
44 |             },
45 |             compress: {
46 |               ecma: 5,
47 |               warnings: false,
48 |               comparisons: false,
49 |               inline: 2,
50 |             },
51 |             mangle: {
52 |               safari10: true,
53 |             },
54 |             output: {
55 |               ecma: 5,
56 |               comments: false,
57 |               ascii_only: true,
58 |             },
59 |           },
60 |           parallel: true,
61 |         }),
62 |         new CssMinimizerPlugin(),
63 |       ],
64 |       splitChunks: {
65 |         chunks: 'all',
66 |       },
67 |     },
68 |     devServer: {
69 |       static: {
70 |         directory: path.join(__dirname, 'public'),
71 |       },
72 |       historyApiFallback: true,
73 |       open: true,
74 |       hot: true,
75 |       port: 3000,
76 |     },
77 |     resolve: {
78 |       extensions: ['.js', '.jsx'],
79 |     },
80 |     plugins: [
81 |       new HtmlWebpackPlugin({
82 |         template: './public/index.html',
83 |       }),
84 |     ],
85 |     devtool: isProduction ? 'source-map' : 'eval-source-map',
86 |   };
87 | 
88 |   if (env.analyze) {
89 |     config.plugins.push(new BundleAnalyzerPlugin());
90 |   }
91 | 
92 |   return config;
93 | };


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