Production-Ready useIntersectionObserver Hook

import { useEffect, useRef, useState } from 'react';

export function useIntersectionObserver(
  options: IntersectionObserverInit = {}
) {
  const elementRef = useRef(null);
  const [isIntersecting, setIsIntersecting] = useState(false);

  useEffect(() => {
    const element = elementRef.current;
    if (!element) return;

    const observer = new IntersectionObserver(([entry]) => {
      setIsIntersecting(entry.isIntersecting);
    }, options);

    observer.observe(element);

    return () => {
      observer.unobserve(element);
    };
  }, [options]);

  return [elementRef, isIntersecting] as const;
}