#6127 - Hover mouse over ambiguous monomer on Micromolecules canvas c…

…auses app crash (#6128)
epam · Dec 11, 2024 · 89f5ce6 · 89f5ce6
1 parent cca5f90
commit 89f5ce6
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/packages/ketcher-react/src/components/MonomerPreview/calculatePreviewPosition.ts b/packages/ketcher-react/src/components/MonomerPreview/calculatePreviewPosition.ts
@@ -30,7 +30,7 @@ function calculateTop(
   target: CalculatePreviewTopPayload,
   height: number,
 ): number {
-  const canvasWrapperBoundingClientRect = ZoomTool.instance.canvasWrapper
+  const canvasWrapperBoundingClientRect = ZoomTool.instance?.canvasWrapper
     .node()
     ?.getBoundingClientRect();
   const canvasWrapperTopOffset = canvasWrapperBoundingClientRect?.top || 0;