Created
January 3, 2025 18:05
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React hook to detect overflow on a ref
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import { type RefObject, useEffect, useState } from 'react'; | |
function checkOverflow(el: HTMLElement | null): boolean { | |
if (!el) return false; | |
return el.offsetHeight < el.scrollHeight || el.offsetWidth < el.scrollWidth; | |
} | |
export function useHasOverflow(ref: RefObject<HTMLElement | null>) { | |
const [overflow, setOverflow] = useState(false); | |
useEffect(() => { | |
const handler = () => { | |
setOverflow(checkOverflow(ref.current)); | |
}; | |
handler(); | |
window.addEventListener('resize', handler, true); | |
return () => { | |
window.removeEventListener('resize', handler, true); | |
}; | |
}, [ref]); | |
return overflow; | |
} |
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