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How React Components Are Reused
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <meta charset="UTF-8" /> | |
| <title>React</title> | |
| </head> | |
| <body> | |
| <div id="root"></div> | |
| </body> | |
| <script src="https://unpkg.com/react@17/umd/react.development.js"></script> | |
| <script src="https://unpkg.com/react-dom@17/umd/react-dom.development.js"></script> | |
| <script src="https://unpkg.com/@babel/standalone/babel.min.js"></script> | |
| <script type="text/babel"> | |
| const {useState, useEffect} = React; | |
| function useMouseLocation(location){ | |
| return ( | |
| <> | |
| <h1>Please move the mouse here</h1> | |
| <p>The current mouse position is: x:{location.x} y:{location.y}</p> | |
| </> | |
| ); | |
| } | |
| function MouseTracker(props){ | |
| const [x, setX] = useState(0); | |
| const [y, setY] = useState(0); | |
| function handleMouseMove(event){ | |
| setX(event.clientX); | |
| setY(event.clientY); | |
| } | |
| return ( | |
| <div onMouseMove={handleMouseMove}> | |
| {useMouseLocation({x, y})} | |
| </div> | |
| ) | |
| } | |
| ReactDOM.render( | |
| <MouseTracker/>, | |
| document.getElementById("root") | |
| ); | |
| </script> | |
| </html> | |
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