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prevent IntersectionObserver error on unobserve with null ref

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This commit is contained in:
pramod mahajan 2025-07-18 15:01:44 +05:30
parent 425c32750c
commit 89085d5069
1 changed files with 21 additions and 18 deletions
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39
src/pages/Gallary/ImageGallary.jsx
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@ -106,24 +106,27 @@ const ImageGallery = () => {
return () => eventBus.off("image_gallery", handler); return () => eventBus.off("image_gallery", handler);
}, [selectedProjectId, refetch]); }, [selectedProjectId, refetch]);
useEffect(() => { useEffect(() => {
if (!loaderRef.current) return; if (!loaderRef.current) return;
const obs = new IntersectionObserver(
([entry]) => { const observer = new IntersectionObserver(
if ( ([entry]) => {
entry.isIntersecting && if (entry.isIntersecting && hasNextPage && !isFetchingNextPage && !isLoading) {
hasNextPage && fetchNextPage();
!isFetchingNextPage && }
!isLoading },
) { { rootMargin: "200px", threshold: 0.1 }
fetchNextPage(); );
}
}, observer.observe(loaderRef.current);
{ rootMargin: "200px", threshold: 0.1 }
); return () => {
obs.observe(loaderRef.current); if (loaderRef.current) {
return () => obs.unobserve(loaderRef.current); observer.unobserve(loaderRef.current);
}, [hasNextPage, isFetchingNextPage, isLoading, fetchNextPage]); }
};
}, [hasNextPage, isFetchingNextPage, isLoading, fetchNextPage]);
// Utility: derive filter options // Utility: derive filter options
const getUniqueValues = useCallback( const getUniqueValues = useCallback(