21 lines
608 B
JavaScript
21 lines
608 B
JavaScript
import { useEffect, useState } from "react";
|
|
|
|
export function useIntersectObserver(element, offset, once) {
|
|
const [isInViewport, setIsInViewport] = useState(false);
|
|
|
|
useEffect(() => {
|
|
const current = element?.current;
|
|
const observer = new IntersectionObserver(([entry]) => {
|
|
setIsInViewport(entry.isIntersecting);
|
|
if (entry.isIntersecting && once) {
|
|
observer.unobserve(current);
|
|
}
|
|
}, { rootMargin: offset });
|
|
|
|
current && observer.observe(current);
|
|
|
|
return () => current && observer.unobserve(current);
|
|
}, [element, offset, once]);
|
|
|
|
return isInViewport;
|
|
} |