import { useCallback, useEffect, useRef } from 'react' export const useResizeObserver = (handleResize: (element: Element) => void) => { const resizeRef = useRef<{ element: Element observer: ResizeObserver } | null>(null) const elementRef = useCallback( (element: Element | null) => { if (element && 'ResizeObserver' in window) { if (resizeRef.current) { resizeRef.current.observer.unobserve(resizeRef.current.element) } const observer = new ResizeObserver(([entry]) => { handleResize(entry.target) }) resizeRef.current = { element, observer } observer.observe(element) handleResize(element) // trigger the callback once } }, [handleResize] ) useEffect(() => { return () => { if (resizeRef.current) { resizeRef.current.observer.unobserve(resizeRef.current.element) } } }, []) return { elementRef, resizeRef } }