React Quickly, Second Edition by copyright-2022-manning-publications.html

Author:copyright-2022-manning-publications.html
Language: eng
Format: epub, pdf

To do that, we need to listen for the mousemove event. In React, that means that we assign a function as the onMouseMove property on our target element. In this case, we will just use a <section> element and display our result in a heading inside of that. See this implemented in listing 8.2 and see the result in figure 8.2.

Listing 8.2 Is the mouse moving?

import { useState } from 'react'; function MouseStatus() { const [isMoving, setMoving] = useState(false); const onMouseMove = () => setMoving(true); #A useEffect(() => { if (!isMoving) return; const timeout = setTimeout(() => setMoving(false), 500); return () => clearTimeout(timeout); }, [isMoving]); return ( <section onMouseMove={onMouseMove}> #B <h2> The mouse is {!isMoving && 'not'} moving: {isMoving ? '✓' : '✗'} </h2> </section> ); }

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