hooks use-on-screen.ts

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2x
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
2x
  import { useState, useEffect, useMemo } from "react";
 
const useOnScreen = (ref: React.MutableRefObject<Element | null>) => {
  const [isIntersecting, setIntersecting] = useState(false);
  const observer = useMemo(() => {
    return new IntersectionObserver(([entry]) =>
      setIntersecting(entry.isIntersecting),
    );
  }, []);
 
  useEffect(() => {
    if (ref.current) {
      observer.observe(ref.current);
    }
    // Remove the observer as soon as the component is unmounted
    return () => {
      observer.disconnect();
    };
  }, [observer, ref]);
 
  return isIntersecting;
};
 
export default useOnScreen;