From f702e26a923758c59945d49a17d7a6599c63e16b Mon Sep 17 00:00:00 2001
From: Bilal Shafi <bilalshafidev@gmail.com>
Date: Mon, 9 Oct 2023 19:58:40 +0500
Subject: [PATCH] [DataGrid] Fix LazyLoading demo crash

---
 .../src/hooks/features/lazyLoader/useGridLazyLoader.ts        | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/packages/grid/x-data-grid-pro/src/hooks/features/lazyLoader/useGridLazyLoader.ts b/packages/grid/x-data-grid-pro/src/hooks/features/lazyLoader/useGridLazyLoader.ts
index d90e2f8ab160..6f19a0a3721f 100644
--- a/packages/grid/x-data-grid-pro/src/hooks/features/lazyLoader/useGridLazyLoader.ts
+++ b/packages/grid/x-data-grid-pro/src/hooks/features/lazyLoader/useGridLazyLoader.ts
@@ -36,9 +36,9 @@ function findSkeletonRowsSection({
 
   while (!isSkeletonSectionFound && firstRowIndex < lastRowIndex) {
     const isStartingWithASkeletonRow =
-      apiRef.current.getRowNode(visibleRowsSection[startIndex].id)!.type === 'skeletonRow';
+      apiRef.current.getRowNode(visibleRowsSection[startIndex].id)?.type === 'skeletonRow';
     const isEndingWithASkeletonRow =
-      apiRef.current.getRowNode(visibleRowsSection[endIndex].id)!.type === 'skeletonRow';
+      apiRef.current.getRowNode(visibleRowsSection[endIndex].id)?.type === 'skeletonRow';
 
     if (isStartingWithASkeletonRow && isEndingWithASkeletonRow) {
       isSkeletonSectionFound = true;