Created
May 28, 2022 11:39
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React-adv-9 Hooks, usestate
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| <html> | |
| <head> | |
| <meta charset="UTF-8" /> | |
| <script src="https://unpkg.com/react@16/umd/react.development.js"></script> | |
| <script src="https://unpkg.com/react-dom@16/umd/react-dom.development.js"></script> | |
| <script src="https://unpkg.com/@babel/standalone/babel.min.js"></script> | |
| <link rel="stylesheet" href="./style.css"> | |
| </head> | |
| <body> | |
| <div id="root"></div> | |
| <script type="text/jsx" src="script.jsx"></script> | |
| </body> | |
| </html> |
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| function Boxing() { | |
| /* ... = React.useState(); */ | |
| const [isKnockout, setIsKnockout] = React.useState(false); | |
| function handleClick() { | |
| setIsKnockout(true); | |
| } | |
| function restoreSmile() { | |
| setIsKnockout(false); | |
| } | |
| return ( | |
| <div> | |
| {!isKnockout ? ( | |
| <> | |
| <span>🤨</span> | |
| <button onClick={handleClick}>Hook!</button> | |
| </> | |
| ) : ( | |
| <span>🥴</span> | |
| )} | |
| {isKnockout ? ( | |
| <> | |
| <span></span> | |
| <button onClick={restoreSmile}> help!</button> | |
| </> | |
| ) : ( | |
| <span></span> | |
| )} | |
| <span>🥊</span> | |
| </div> | |
| ); | |
| } | |
| ReactDOM.render(( | |
| <Boxing /> | |
| ), document.querySelector('#root')); |
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| *, | |
| *::before, | |
| *::after { | |
| box-sizing: border-box; | |
| } | |
| body { | |
| background: #202020; | |
| font-family: Helvetica, Arial, sans-serif; | |
| } | |
| #root { | |
| height: 100vh; | |
| } | |
| #root > div { | |
| padding: 20px; | |
| } | |
| span { | |
| font-size: 160px; | |
| vertical-align: middle; | |
| margin: 0 -15px; | |
| } | |
| button { | |
| margin: 0 40px; | |
| width: 150px; | |
| height: 50px; | |
| color: #fff; | |
| background-color: #FF7A00; | |
| border: none; | |
| border-radius: 20px; | |
| cursor: pointer; | |
| font-weight: bold; | |
| font-size: 36px; | |
| } |
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