20 lines
476 B
TypeScript
20 lines
476 B
TypeScript
import { useState, useEffect } from 'react';
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export default function useOnScreen(ref) {
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let observer = null
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const [isIntersecting, setIntersecting] = useState(false)
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useEffect(() => {
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observer = new IntersectionObserver(
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([entry]) => setIntersecting(entry.isIntersecting)
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)
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observer.observe(ref.current)
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// Remove the observer as soon as the component is unmounted
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return () => { observer.disconnect() }
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}, [])
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return isIntersecting
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} |