Created
May 21, 2022 08:34
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react strict mode
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| <!DOCTYPE html> | |
| <html lang="en"> | |
| <head> | |
| <meta charset="UTF-8" /> | |
| <meta http-equiv="X-UA-Compatible" content="IE=edge" /> | |
| <meta name="viewport" content="width=device-width, initial-scale=1.0" /> | |
| <title>React strict mode test</title> | |
| </head> | |
| <body> | |
| <div id="app"></div> | |
| <!-- <script | |
| crossorigin | |
| src="https://unpkg.com/react@18/umd/react.development.js" | |
| ></script> --> | |
| <script | |
| crossorigin | |
| src="https://unpkg.com/react@18/umd/react.production.min.js" | |
| ></script> | |
| <!-- <script | |
| crossorigin | |
| src="https://unpkg.com/react-dom@18/umd/react-dom.development.js" | |
| ></script> --> | |
| <script | |
| crossorigin | |
| src="https://unpkg.com/react-dom@18/umd/react-dom.production.min.js" | |
| ></script> | |
| <script src="https://unpkg.com/@babel/standalone/babel.min.js"></script> | |
| <script | |
| type="text/babel" | |
| data-presets="react" | |
| data-type="module" | |
| src="./main.js" | |
| ></script> | |
| </body> | |
| </html> |
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| let count = 0; | |
| const App = () => { | |
| console.log(count++); // 0, 1 | |
| return <div>App</div>; | |
| }; | |
| const root = ReactDOM.createRoot(document.querySelector("#app")); | |
| root.render( | |
| <React.StrictMode> | |
| <App /> | |
| </React.StrictMode> | |
| ); |
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발행한 글: https://jeonghwan-kim.github.io/2022/05/20/react-strict-mode