43 lines
1.3 KiB
TypeScript
43 lines
1.3 KiB
TypeScript
import type { RefObject } from "react";
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import { useEffect } from "react";
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export type UseIntersectionObserverProps = {
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containerRef: RefObject<HTMLDivElement | null> | undefined;
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elementRef: HTMLElement | null;
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callback: () => void;
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rootMargin?: string;
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};
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export const useIntersectionObserver = (
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containerRef: RefObject<HTMLDivElement | null>,
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elementRef: HTMLElement | null,
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callback: (() => void) | undefined,
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rootMargin?: string
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) => {
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useEffect(() => {
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if (elementRef) {
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const observer = new IntersectionObserver(
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(entries) => {
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if (entries[entries.length - 1].isIntersecting) {
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callback && callback();
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}
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},
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{
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root: containerRef?.current,
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rootMargin,
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}
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);
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observer.observe(elementRef);
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return () => {
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if (elementRef) {
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// eslint-disable-next-line react-hooks/exhaustive-deps
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observer.unobserve(elementRef);
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}
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};
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}
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// When i am passing callback as a dependency, it is causing infinite loop,
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// Please make sure you fix this eslint lint disable error with caution
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// eslint-disable-next-line react-hooks/exhaustive-deps
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}, [rootMargin, callback, elementRef, containerRef.current]);
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};
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