From 4340144e3963496f70a6cc322ab581b649bb9707 Mon Sep 17 00:00:00 2001
From: Vlad Rindevich <vladrin@vaadin.com>
Date: Wed, 18 Aug 2021 12:58:15 +0300
Subject: [PATCH] fix: add check for SSR environment

---
 src/Tree.tsx | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/Tree.tsx b/src/Tree.tsx
index 57489a8..bdf5b3d 100644
--- a/src/Tree.tsx
+++ b/src/Tree.tsx
@@ -286,7 +286,7 @@ const generateNewTree = <
   let tempRecord: NodeRecord<TNodePublicState> | null = rootRecord;
 
   const useIdleCallback =
-    'requestIdleCallback' in window &&
+    typeof 'requestIdleCallback' !== 'undefined' &&
     placeholder !== undefined &&
     // If placeholder is set to null and this is the first build, idle callback
     // won't be used. It is necessary for trees with async data which can be