├── public
    ├── robots.txt
    ├── favicon.ico
    ├── logo192.png
    ├── logo512.png
    ├── manifest.json
    └── index.html
├── src
    ├── chapter_14
    │   ├── ThemeContext.jsx
    │   ├── DarkOrLight.jsx
    │   └── MainContent.jsx
    ├── setupTests.js
    ├── App.test.js
    ├── chapter_04
    │   └── Clock.jsx
    ├── chapter_03
    │   ├── Book.jsx
    │   └── Library.jsx
    ├── chapter_13
    │   ├── ProfileCard.jsx
    │   └── Card.jsx
    ├── chapter_07
    │   ├── useCounter.jsx
    │   └── Accommodate.jsx
    ├── index.css
    ├── reportWebVitals.js
    ├── chapter_08
    │   └── ConfirmButton.jsx
    ├── chapter_12
    │   ├── TemperatureInput.jsx
    │   └── Calculator.jsx
    ├── App.js
    ├── chapter_10
    │   └── AttendanceBook.jsx
    ├── App.css
    ├── chapter_05
    │   ├── CommentList.jsx
    │   └── Comment.jsx
    ├── chapter_09
    │   ├── LandingPage.jsx
    │   └── Toolbar.jsx
    ├── chapter_06
    │   ├── Notification.jsx
    │   └── NotificationList.jsx
    ├── chapter_11
    │   └── SignUp.jsx
    ├── index.js
    ├── chapter_15
    │   └── Blocks.jsx
    └── logo.svg
├── .gitignore
├── README.md
└── package.json


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


--------------------------------------------------------------------------------
/public/favicon.ico:
--------------------------------------------------------------------------------
https://raw.githubusercontent.com/soaple/first-met-react-practice-v18/HEAD/public/favicon.ico


--------------------------------------------------------------------------------
/public/logo192.png:
--------------------------------------------------------------------------------
https://raw.githubusercontent.com/soaple/first-met-react-practice-v18/HEAD/public/logo192.png


--------------------------------------------------------------------------------
/public/logo512.png:
--------------------------------------------------------------------------------
https://raw.githubusercontent.com/soaple/first-met-react-practice-v18/HEAD/public/logo512.png


--------------------------------------------------------------------------------
/src/chapter_14/ThemeContext.jsx:
--------------------------------------------------------------------------------
1 | import React from "react";
2 | 
3 | const ThemeContext = React.createContext();
4 | ThemeContext.displayName = "ThemeContext";
5 | 
6 | export default ThemeContext;
7 | 


--------------------------------------------------------------------------------
/src/setupTests.js:
--------------------------------------------------------------------------------
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 | 


--------------------------------------------------------------------------------
/src/App.test.js:
--------------------------------------------------------------------------------
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 | 


--------------------------------------------------------------------------------
/src/chapter_04/Clock.jsx:
--------------------------------------------------------------------------------
 1 | import React from "react";
 2 | 
 3 | function Clock(props) {
 4 |     return (
 5 |         <div>
 6 |             <h1>안녕, 리액트!</h1>
 7 |             <h2>현재 시간: {new Date().toLocaleTimeString()}</h2>
 8 |         </div>
 9 |     );
10 | }
11 | 
12 | export default Clock;
13 | 


--------------------------------------------------------------------------------
/src/chapter_03/Book.jsx:
--------------------------------------------------------------------------------
 1 | import React from "react";
 2 | 
 3 | function Book(props) {
 4 |     return (
 5 |         <div>
 6 |             <h1>{`이 책의 이름은 ${props.name}입니다.`}</h1>
 7 |             <h2>{`이 책은 총 ${props.numOfPage}페이지로 이뤄져 있습니다.`}</h2>
 8 |         </div>
 9 |     );
10 | }
11 | 
12 | export default Book;
13 | 


--------------------------------------------------------------------------------
/src/chapter_13/ProfileCard.jsx:
--------------------------------------------------------------------------------
 1 | import Card from "./Card";
 2 | 
 3 | function ProfileCard(props) {
 4 |     return (
 5 |         <Card title="Inje Lee" backgroundColor="#4ea04e">
 6 |             <p>안녕하세요, 소플입니다.</p>
 7 |             <p>저는 리액트를 사용해서 개발하고 있습니다.</p>
 8 |         </Card>
 9 |     );
10 | }
11 | 
12 | export default ProfileCard;
13 | 


--------------------------------------------------------------------------------
/src/chapter_03/Library.jsx:
--------------------------------------------------------------------------------
 1 | import React from "react";
 2 | import Book from "./Book";
 3 | 
 4 | function Library(props) {
 5 |     return (
 6 |         <div>
 7 |             <Book name="처음 만난 파이썬" numOfPage={300} />
 8 |             <Book name="처음 만난 AWS" numOfPage={400} />
 9 |             <Book name="처음 만난 리액트" numOfPage={500} />
10 |         </div>
11 |     );
12 | }
13 | 
14 | export default Library;
15 | 


--------------------------------------------------------------------------------
/.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 | 
14 | # misc
15 | .DS_Store
16 | .env.local
17 | .env.development.local
18 | .env.test.local
19 | .env.production.local
20 | 
21 | npm-debug.log*
22 | yarn-debug.log*
23 | yarn-error.log*
24 | 


--------------------------------------------------------------------------------
/README.md:
--------------------------------------------------------------------------------
 1 | # 소플의 처음 만난 리액트 실습 소스코드 (리액트 v18)
 2 | 
 3 | 웹 애플리케이션을 개발모드로 실행합니다.
 4 | ```bash
 5 | $ npm start
 6 | ```
 7 | 
 8 | 이후 [http://localhost:3000](http://localhost:3000)에서 접속 가능합니다.
 9 | 
10 | ---
11 | 
12 | ## 🚨 현재 리액트 19 정식 릴리즈로 인해 `create-react-app`이 제대로 작동하지 않습니다.
13 | 
14 | 아래 명령어를 참고해서 Yarn 설치하고, Yarn을 사용해서 리액트 앱을 생성하고 실습을 진행해주세요!
15 | 
16 | ```bash
17 | npm install -g yarn
18 | yarn create react-app my-app
19 | ```
20 | 


--------------------------------------------------------------------------------
/src/chapter_07/useCounter.jsx:
--------------------------------------------------------------------------------
 1 | import React, { useState } from "react";
 2 | 
 3 | function useCounter(initialValue) {
 4 |     const [count, setCount] = useState(initialValue);
 5 | 
 6 |     const increaseCount = () => setCount((count) => count + 1);
 7 |     const decreaseCount = () => setCount((count) => Math.max(count - 1, 0));
 8 | 
 9 |     return [count, increaseCount, decreaseCount];
10 | }
11 | 
12 | export default useCounter;
13 | 


--------------------------------------------------------------------------------
/src/index.css:
--------------------------------------------------------------------------------
 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 | 


--------------------------------------------------------------------------------
/src/reportWebVitals.js:
--------------------------------------------------------------------------------
 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 | 


--------------------------------------------------------------------------------
/src/chapter_08/ConfirmButton.jsx:
--------------------------------------------------------------------------------
 1 | import React, { useState } from "react";
 2 | 
 3 | function ConfirmButton(props) {
 4 |     const [isConfirmed, setIsConfirmed] = useState(false);
 5 | 
 6 |     const handleConfirm = () => {
 7 |         setIsConfirmed((prevIsConfirmed) => !prevIsConfirmed);
 8 |     };
 9 | 
10 |     return (
11 |         <button onClick={handleConfirm} disabled={isConfirmed}>
12 |             {isConfirmed ? "확인됨" : "확인하기"}
13 |         </button>
14 |     );
15 | }
16 | 
17 | export default ConfirmButton;
18 | 


--------------------------------------------------------------------------------
/src/chapter_13/Card.jsx:
--------------------------------------------------------------------------------
 1 | function Card(props) {
 2 |     const { title, backgroundColor, children } = props;
 3 | 
 4 |     return (
 5 |         <div
 6 |             style={{
 7 |                 margin: 8,
 8 |                 padding: 8,
 9 |                 borderRadius: 8,
10 |                 boxShadow: "0px 0px 4px grey",
11 |                 backgroundColor: backgroundColor || "white",
12 |             }}
13 |         >
14 |             {title && <h1>{title}</h1>}
15 |             {children}
16 |         </div>
17 |     );
18 | }
19 | 
20 | export default Card;
21 | 


--------------------------------------------------------------------------------
/src/chapter_12/TemperatureInput.jsx:
--------------------------------------------------------------------------------
 1 | const scaleNames = {
 2 |     c: "섭씨",
 3 |     f: "화씨",
 4 | };
 5 | 
 6 | function TemperatureInput(props) {
 7 |     const handleChange = (event) => {
 8 |         props.onTemperatureChange(event.target.value);
 9 |     };
10 | 
11 |     return (
12 |         <fieldset>
13 |             <legend>
14 |                 온도를 입력해주세요(단위:{scaleNames[props.scale]}):
15 |             </legend>
16 |             <input value={props.temperature} onChange={handleChange} />
17 |         </fieldset>
18 |     );
19 | }
20 | 
21 | export default TemperatureInput;
22 | 


--------------------------------------------------------------------------------
/public/manifest.json:
--------------------------------------------------------------------------------
 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 | 


--------------------------------------------------------------------------------
/src/App.js:
--------------------------------------------------------------------------------
 1 | import logo from './logo.svg';
 2 | import './App.css';
 3 | 
 4 | function App() {
 5 |   return (
 6 |     <div className="App">
 7 |       <header className="App-header">
 8 |         <img src={logo} className="App-logo" alt="logo" />
 9 |         <p>
10 |           Edit <code>src/App.js</code> and save to reload.
11 |         </p>
12 |         <a
13 |           className="App-link"
14 |           href="https://reactjs.org"
15 |           target="_blank"
16 |           rel="noopener noreferrer"
17 |         >
18 |           Learn React
19 |         </a>
20 |       </header>
21 |     </div>
22 |   );
23 | }
24 | 
25 | export default App;
26 | 


--------------------------------------------------------------------------------
/src/chapter_10/AttendanceBook.jsx:
--------------------------------------------------------------------------------
 1 | import React from "react";
 2 | 
 3 | const students = [
 4 |     {
 5 |         id: 1,
 6 |         name: "Inje",
 7 |     },
 8 |     {
 9 |         id: 2,
10 |         name: "Steve",
11 |     },
12 |     {
13 |         id: 3,
14 |         name: "Bill",
15 |     },
16 |     {
17 |         id: 4,
18 |         name: "Jeff",
19 |     },
20 | ];
21 | 
22 | function AttendanceBook(props) {
23 |     return (
24 |         <ul>
25 |             {students.map((student, index) => {
26 |                 return <li key={student.id}>{student.name}</li>;
27 |             })}
28 |         </ul>
29 |     );
30 | }
31 | 
32 | export default AttendanceBook;
33 | 


--------------------------------------------------------------------------------
/src/chapter_14/DarkOrLight.jsx:
--------------------------------------------------------------------------------
 1 | import { useState, useCallback } from "react";
 2 | import ThemeContext from "./ThemeContext";
 3 | import MainContent from "./MainContent";
 4 | 
 5 | function DarkOrLight(props) {
 6 |     const [theme, setTheme] = useState("light");
 7 | 
 8 |     const toggleTheme = useCallback(() => {
 9 |         if (theme == "light") {
10 |             setTheme("dark");
11 |         } else if (theme == "dark") {
12 |             setTheme("light");
13 |         }
14 |     }, [theme]);
15 | 
16 |     return (
17 |         <ThemeContext.Provider value={{ theme, toggleTheme }}>
18 |             <MainContent />
19 |         </ThemeContext.Provider>
20 |     );
21 | }
22 | 
23 | export default DarkOrLight;
24 | 


--------------------------------------------------------------------------------
/src/App.css:
--------------------------------------------------------------------------------
 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 | 


--------------------------------------------------------------------------------
/src/chapter_05/CommentList.jsx:
--------------------------------------------------------------------------------
 1 | import React from "react";
 2 | import Comment from "./Comment";
 3 | 
 4 | const comments = [
 5 |     {
 6 |         name: "이인제",
 7 |         comment: "안녕하세요, 소플입니다.",
 8 |     },
 9 |     {
10 |         name: "유재석",
11 |         comment: "리액트 재미있어요~!",
12 |     },
13 |     {
14 |         name: "강민경",
15 |         comment: "저도 리액트 배워보고 싶어요!!",
16 |     },
17 | ];
18 | 
19 | function CommentList(props) {
20 |     return (
21 |         <div>
22 |             {comments.map((comment) => {
23 |                 return (
24 |                     <Comment name={comment.name} comment={comment.comment} />
25 |                 );
26 |             })}
27 |         </div>
28 |     );
29 | }
30 | 
31 | export default CommentList;
32 | 


--------------------------------------------------------------------------------
/src/chapter_09/LandingPage.jsx:
--------------------------------------------------------------------------------
 1 | import React, { useState } from "react";
 2 | import Toolbar from "./Toolbar";
 3 | 
 4 | function LandingPage(props) {
 5 |     const [isLoggedIn, setIsLoggedIn] = useState(false);
 6 | 
 7 |     const onClickLogin = () => {
 8 |         setIsLoggedIn(true);
 9 |     };
10 | 
11 |     const onClickLogout = () => {
12 |         setIsLoggedIn(false);
13 |     };
14 | 
15 |     return (
16 |         <div>
17 |             <Toolbar
18 |                 isLoggedIn={isLoggedIn}
19 |                 onClickLogin={onClickLogin}
20 |                 onClickLogout={onClickLogout}
21 |             />
22 |             <div style={{ padding: 16 }}>소플과 함께하는 리액트 공부!</div>
23 |         </div>
24 |     );
25 | }
26 | 
27 | export default LandingPage;
28 | 


--------------------------------------------------------------------------------
/src/chapter_14/MainContent.jsx:
--------------------------------------------------------------------------------
 1 | import { useContext } from "react";
 2 | import ThemeContext from "./ThemeContext";
 3 | 
 4 | function MainContent(props) {
 5 |     const { theme, toggleTheme } = useContext(ThemeContext);
 6 | 
 7 |     return (
 8 |         <div
 9 |             style={{
10 |                 width: "100vw",
11 |                 height: "100vh",
12 |                 padding: "1.5rem",
13 |                 backgroundColor: theme == "light" ? "white" : "black",
14 |                 color: theme == "light" ? "black" : "white",
15 |             }}
16 |         >
17 |             <p>안녕하세요, 테마 변경이 가능한 웹사이트 입니다.</p>
18 |             <button onClick={toggleTheme}>테마 변경</button>
19 |         </div>
20 |     );
21 | }
22 | 
23 | export default MainContent;
24 | 


--------------------------------------------------------------------------------
/src/chapter_09/Toolbar.jsx:
--------------------------------------------------------------------------------
 1 | import React from "react";
 2 | 
 3 | const styles = {
 4 |     wrapper: {
 5 |         padding: 16,
 6 |         display: "flex",
 7 |         flexDirection: "row",
 8 |         borderBottom: "1px solid grey",
 9 |     },
10 |     greeting: {
11 |         marginRight: 8,
12 |     },
13 | };
14 | 
15 | function Toolbar(props) {
16 |     const { isLoggedIn, onClickLogin, onClickLogout } = props;
17 | 
18 |     return (
19 |         <div style={styles.wrapper}>
20 |             {isLoggedIn && <span style={styles.greeting}>환영합니다!</span>}
21 | 
22 |             {isLoggedIn ? (
23 |                 <button onClick={onClickLogout}>로그아웃</button>
24 |             ) : (
25 |                 <button onClick={onClickLogin}>로그인</button>
26 |             )}
27 |         </div>
28 |     );
29 | }
30 | 
31 | export default Toolbar;
32 | 


--------------------------------------------------------------------------------
/package.json:
--------------------------------------------------------------------------------
 1 | {
 2 |   "name": "first-met-react-practice-v18",
 3 |   "version": "0.1.0",
 4 |   "private": true,
 5 |   "dependencies": {
 6 |     "@testing-library/jest-dom": "^5.16.5",
 7 |     "@testing-library/react": "^13.3.0",
 8 |     "@testing-library/user-event": "^13.5.0",
 9 |     "react": "^18.2.0",
10 |     "react-dom": "^18.2.0",
11 |     "react-scripts": "5.0.1",
12 |     "styled-components": "^5.3.5",
13 |     "web-vitals": "^2.1.4"
14 |   },
15 |   "scripts": {
16 |     "start": "react-scripts start",
17 |     "build": "react-scripts build",
18 |     "test": "react-scripts test",
19 |     "eject": "react-scripts eject"
20 |   },
21 |   "eslintConfig": {
22 |     "extends": [
23 |       "react-app",
24 |       "react-app/jest"
25 |     ]
26 |   },
27 |   "browserslist": {
28 |     "production": [
29 |       ">0.2%",
30 |       "not dead",
31 |       "not op_mini all"
32 |     ],
33 |     "development": [
34 |       "last 1 chrome version",
35 |       "last 1 firefox version",
36 |       "last 1 safari version"
37 |     ]
38 |   }
39 | }
40 | 


--------------------------------------------------------------------------------
/src/chapter_07/Accommodate.jsx:
--------------------------------------------------------------------------------
 1 | import React, { useState, useEffect } from "react";
 2 | import useCounter from "./useCounter";
 3 | 
 4 | const MAX_CAPACITY = 10;
 5 | 
 6 | function Accommodate(props) {
 7 |     const [isFull, setIsFull] = useState(false);
 8 |     const [count, increaseCount, decreaseCount] = useCounter(0);
 9 | 
10 |     useEffect(() => {
11 |         console.log("======================");
12 |         console.log("useEffect() is called.");
13 |         console.log(`isFull: ${isFull}`);
14 |     });
15 | 
16 |     useEffect(() => {
17 |         setIsFull(count >= MAX_CAPACITY);
18 |         console.log(`Current count value: ${count}`);
19 |     }, [count]);
20 | 
21 |     return (
22 |         <div style={{ padding: 16 }}>
23 |             <p>{`총 ${count}명 수용했습니다.`}</p>
24 | 
25 |             <button onClick={increaseCount} disabled={isFull}>
26 |                 입장
27 |             </button>
28 |             <button onClick={decreaseCount}>퇴장</button>
29 | 
30 |             {isFull && <p style={{ color: "red" }}>정원이 가득찼습니다.</p>}
31 |         </div>
32 |     );
33 | }
34 | 
35 | export default Accommodate;
36 | 


--------------------------------------------------------------------------------
/src/chapter_06/Notification.jsx:
--------------------------------------------------------------------------------
 1 | import React from "react";
 2 | 
 3 | const styles = {
 4 |     wrapper: {
 5 |         margin: 8,
 6 |         padding: 8,
 7 |         display: "flex",
 8 |         flexDirection: "row",
 9 |         border: "1px solid grey",
10 |         borderRadius: 16,
11 |     },
12 |     messageText: {
13 |         color: "black",
14 |         fontSize: 16,
15 |     },
16 | };
17 | 
18 | class Notification extends React.Component {
19 |     constructor(props) {
20 |         super(props);
21 | 
22 |         this.state = {};
23 |     }
24 | 
25 |     componentDidMount() {
26 |         console.log(`${this.props.id} componentDidMount() called.`);
27 |     }
28 | 
29 |     componentDidUpdate() {
30 |         console.log(`${this.props.id} componentDidUpdate() called.`);
31 |     }
32 | 
33 |     componentWillUnmount() {
34 |         console.log(`${this.props.id} componentWillUnmount() called.`);
35 |     }
36 | 
37 |     render() {
38 |         return (
39 |             <div style={styles.wrapper}>
40 |                 <span style={styles.messageText}>{this.props.message}</span>
41 |             </div>
42 |         );
43 |     }
44 | }
45 | 
46 | export default Notification;
47 | 


--------------------------------------------------------------------------------
/src/chapter_11/SignUp.jsx:
--------------------------------------------------------------------------------
 1 | import React, { useState } from "react";
 2 | 
 3 | function SignUp(props) {
 4 |     const [name, setName] = useState("");
 5 |     const [gender, setGender] = useState("남자");
 6 | 
 7 |     const handleChangeName = (event) => {
 8 |         setName(event.target.value);
 9 |     };
10 | 
11 |     const handleChangeGender = (event) => {
12 |         setGender(event.target.value);
13 |     };
14 | 
15 |     const handleSubmit = (event) => {
16 |         alert(`이름: ${name}, 성별: ${gender}`);
17 |         event.preventDefault();
18 |     };
19 | 
20 |     return (
21 |         <form onSubmit={handleSubmit}>
22 |             <label>
23 |                 이름:
24 |                 <input type="text" value={name} onChange={handleChangeName} />
25 |             </label>
26 |             <br />
27 |             <label>
28 |                 성별:
29 |                 <select value={gender} onChange={handleChangeGender}>
30 |                     <option value="남자">남자</option>
31 |                     <option value="여자">여자</option>
32 |                 </select>
33 |             </label>
34 |             <button type="submit">제출</button>
35 |         </form>
36 |     );
37 | }
38 | 
39 | export default SignUp;
40 | 


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/src/index.js:
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 1 | import React from 'react';
 2 | import ReactDOM from 'react-dom/client';
 3 | import './index.css';
 4 | import App from './App';
 5 | import reportWebVitals from './reportWebVitals';
 6 | 
 7 | import Library from './chapter_03/Library';
 8 | import Clock from './chapter_04/Clock';
 9 | import CommentList from './chapter_05/CommentList';
10 | import NotificationList from './chapter_06/NotificationList';
11 | import Accommodate from './chapter_07/Accommodate';
12 | import ConfirmButton from './chapter_08/ConfirmButton';
13 | import LandingPage from './chapter_09/LandingPage';
14 | import AttendanceBook from './chapter_10/AttendanceBook';
15 | import SignUp from './chapter_11/SignUp';
16 | import Calculator from './chapter_12/Calculator';
17 | import ProfileCard from './chapter_13/ProfileCard';
18 | import DarkOrLight from './chapter_14/DarkOrLight';
19 | import Blocks from './chapter_15/Blocks';
20 | 
21 | const root = ReactDOM.createRoot(document.getElementById('root'));
22 | root.render(
23 |   <React.StrictMode>
24 |     <Blocks />
25 |   </React.StrictMode>
26 | );
27 | 
28 | // If you want to start measuring performance in your app, pass a function
29 | // to log results (for example: reportWebVitals(console.log))
30 | // or send to an analytics endpoint. Learn more: https://bit.ly/CRA-vitals
31 | reportWebVitals();
32 | 


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/src/chapter_05/Comment.jsx:
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 1 | import React from "react";
 2 | 
 3 | const styles = {
 4 |     wrapper: {
 5 |         margin: 8,
 6 |         padding: 8,
 7 |         display: "flex",
 8 |         flexDirection: "row",
 9 |         border: "1px solid grey",
10 |         borderRadius: 16,
11 |     },
12 |     imageContainer: {},
13 |     image: {
14 |         width: 50,
15 |         height: 50,
16 |         borderRadius: 25,
17 |     },
18 |     contentContainer: {
19 |         marginLeft: 8,
20 |         display: "flex",
21 |         flexDirection: "column",
22 |         justifyContent: "center",
23 |     },
24 |     nameText: {
25 |         color: "black",
26 |         fontSize: 16,
27 |         fontWeight: "bold",
28 |     },
29 |     commentText: {
30 |         color: "black",
31 |         fontSize: 16,
32 |     },
33 | };
34 | 
35 | function Comment(props) {
36 |     return (
37 |         <div style={styles.wrapper}>
38 |             <div style={styles.imageContainer}>
39 |                 <img
40 |                     src="https://upload.wikimedia.org/wikipedia/commons/8/89/Portrait_Placeholder.png"
41 |                     style={styles.image}
42 |                 />
43 |             </div>
44 | 
45 |             <div style={styles.contentContainer}>
46 |                 <span style={styles.nameText}>{props.name}</span>
47 |                 <span style={styles.commentText}>{props.comment}</span>
48 |             </div>
49 |         </div>
50 |     );
51 | }
52 | 
53 | export default Comment;
54 | 


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/src/chapter_15/Blocks.jsx:
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 1 | import styled from "styled-components";
 2 | 
 3 | const Wrapper = styled.div`
 4 |     padding: 1rem;
 5 |     display: flex;
 6 |     flex-direction: row;
 7 |     align-items: flex-start;
 8 |     justify-content: flex-start;
 9 |     background-color: lightgrey;
10 | `;
11 | 
12 | const Block = styled.div`
13 |     padding: ${(props) => props.padding};
14 |     border: 1px solid black;
15 |     border-radius: 1rem;
16 |     background-color: ${(props) => props.backgroundColor};
17 |     color: white;
18 |     font-size: 2rem;
19 |     font-weight: bold;
20 |     text-align: center;
21 | `;
22 | 
23 | const blockItems = [
24 |     {
25 |         label: "1",
26 |         padding: "1rem",
27 |         backgroundColor: "red",
28 |     },
29 |     {
30 |         label: "2",
31 |         padding: "3rem",
32 |         backgroundColor: "green",
33 |     },
34 |     {
35 |         label: "3",
36 |         padding: "2rem",
37 |         backgroundColor: "blue",
38 |     },
39 | ];
40 | 
41 | function Blocks(props) {
42 |     return (
43 |         <Wrapper>
44 |             {blockItems.map((blockItem) => {
45 |                 return (
46 |                     <Block
47 |                         padding={blockItem.padding}
48 |                         backgroundColor={blockItem.backgroundColor}
49 |                     >
50 |                         {blockItem.label}
51 |                     </Block>
52 |                 );
53 |             })}
54 |         </Wrapper>
55 |     );
56 | }
57 | 
58 | export default Blocks;
59 | 


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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 |     <link rel="icon" href="%PUBLIC_URL%/favicon.ico" />
 6 |     <meta name="viewport" content="width=device-width, initial-scale=1" />
 7 |     <meta name="theme-color" content="#000000" />
 8 |     <meta
 9 |       name="description"
10 |       content="Web site created using create-react-app"
11 |     />
12 |     <link rel="apple-touch-icon" href="%PUBLIC_URL%/logo192.png" />
13 |     <!--
14 |       manifest.json provides metadata used when your web app is installed on a
15 |       user's mobile device or desktop. See https://developers.google.com/web/fundamentals/web-app-manifest/
16 |     -->
17 |     <link rel="manifest" href="%PUBLIC_URL%/manifest.json" />
18 |     <!--
19 |       Notice the use of %PUBLIC_URL% in the tags above.
20 |       It will be replaced with the URL of the `public` folder during the build.
21 |       Only files inside the `public` folder can be referenced from the HTML.
22 | 
23 |       Unlike "/favicon.ico" or "favicon.ico", "%PUBLIC_URL%/favicon.ico" will
24 |       work correctly both with client-side routing and a non-root public URL.
25 |       Learn how to configure a non-root public URL by running `npm run build`.
26 |     -->
27 |     <title>React App</title>
28 |   </head>
29 |   <body>
30 |     <noscript>You need to enable JavaScript to run this app.</noscript>
31 |     <div id="root"></div>
32 |     <!--
33 |       This HTML file is a template.
34 |       If you open it directly in the browser, you will see an empty page.
35 | 
36 |       You can add webfonts, meta tags, or analytics to this file.
37 |       The build step will place the bundled scripts into the <body> tag.
38 | 
39 |       To begin the development, run `npm start` or `yarn start`.
40 |       To create a production bundle, use `npm run build` or `yarn build`.
41 |     -->
42 |   </body>
43 | </html>
44 | 


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/src/chapter_06/NotificationList.jsx:
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 1 | import React from "react";
 2 | import Notification from "./Notification";
 3 | 
 4 | const reservedNotifications = [
 5 |     {
 6 |         id: 1,
 7 |         message: "안녕하세요, 오늘 일정을 알려드립니다.",
 8 |     },
 9 |     {
10 |         id: 2,
11 |         message: "점심식사 시간입니다.",
12 |     },
13 |     {
14 |         id: 3,
15 |         message: "이제 곧 미팅이 시작됩니다.",
16 |     },
17 | ];
18 | 
19 | var timer;
20 | 
21 | class NotificationList extends React.Component {
22 |     constructor(props) {
23 |         super(props);
24 | 
25 |         this.state = {
26 |             notifications: [],
27 |         };
28 |     }
29 | 
30 |     componentDidMount() {
31 |         const { notifications } = this.state;
32 |         timer = setInterval(() => {
33 |             if (notifications.length < reservedNotifications.length) {
34 |                 const index = notifications.length;
35 |                 notifications.push(reservedNotifications[index]);
36 |                 this.setState({
37 |                     notifications: notifications,
38 |                 });
39 |             } else {
40 |                 this.setState({
41 |                     notifications: [],
42 |                 });
43 |                 clearInterval(timer);
44 |             }
45 |         }, 1000);
46 |     }
47 | 
48 |     componentWillUnmount() {
49 |         if (timer) {
50 |             clearInterval(timer);
51 |         }
52 |     }
53 | 
54 |     render() {
55 |         return (
56 |             <div>
57 |                 {this.state.notifications.map((notification) => {
58 |                     return (
59 |                         <Notification
60 |                             key={notification.id}
61 |                             id={notification.id}
62 |                             message={notification.message}
63 |                         />
64 |                     );
65 |                 })}
66 |             </div>
67 |         );
68 |     }
69 | }
70 | 
71 | export default NotificationList;
72 | 


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/src/chapter_12/Calculator.jsx:
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 1 | import React, { useState } from "react";
 2 | import TemperatureInput from "./TemperatureInput";
 3 | 
 4 | function BoilingVerdict(props) {
 5 |     if (props.celsius >= 100) {
 6 |         return <p>물이 끓습니다.</p>;
 7 |     }
 8 |     return <p>물이 끓지 않습니다.</p>;
 9 | }
10 | 
11 | function toCelsius(fahrenheit) {
12 |     return ((fahrenheit - 32) * 5) / 9;
13 | }
14 | 
15 | function toFahrenheit(celsius) {
16 |     return (celsius * 9) / 5 + 32;
17 | }
18 | 
19 | function tryConvert(temperature, convert) {
20 |     const input = parseFloat(temperature);
21 |     if (Number.isNaN(input)) {
22 |         return "";
23 |     }
24 |     const output = convert(input);
25 |     const rounded = Math.round(output * 1000) / 1000;
26 |     return rounded.toString();
27 | }
28 | 
29 | function Calculator(props) {
30 |     const [temperature, setTemperature] = useState("");
31 |     const [scale, setScale] = useState("c");
32 | 
33 |     const handleCelsiusChange = (temperature) => {
34 |         setTemperature(temperature);
35 |         setScale("c");
36 |     };
37 | 
38 |     const handleFahrenheitChange = (temperature) => {
39 |         setTemperature(temperature);
40 |         setScale("f");
41 |     };
42 | 
43 |     const celsius =
44 |         scale === "f" ? tryConvert(temperature, toCelsius) : temperature;
45 |     const fahrenheit =
46 |         scale === "c" ? tryConvert(temperature, toFahrenheit) : temperature;
47 | 
48 |     return (
49 |         <div>
50 |             <TemperatureInput
51 |                 scale="c"
52 |                 temperature={celsius}
53 |                 onTemperatureChange={handleCelsiusChange}
54 |             />
55 |             <TemperatureInput
56 |                 scale="f"
57 |                 temperature={fahrenheit}
58 |                 onTemperatureChange={handleFahrenheitChange}
59 |             />
60 |             <BoilingVerdict celsius={parseFloat(celsius)} />
61 |         </div>
62 |     );
63 | }
64 | 
65 | export default Calculator;
66 | 


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/src/logo.svg:
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