From 725214980496d62c3aefe892e3411edabe6a2677 Mon Sep 17 00:00:00 2001
From: tangjinzhou <415800467@qq.com>
Date: Fri, 28 Oct 2022 09:06:22 +0800
Subject: [PATCH] fix: error when menu key dynamic, close #6057

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

diff --git a/components/menu/src/Menu.tsx b/components/menu/src/Menu.tsx
index 006025fc8..f695d2653 100644
--- a/components/menu/src/Menu.tsx
+++ b/components/menu/src/Menu.tsx
@@ -339,7 +339,7 @@ export default defineComponent({
     };
 
     const onInternalOpenChange = (key: Key, open: boolean) => {
-      const childrenEventKeys = keyMapStore.value[key].childrenEventKeys;
+      const childrenEventKeys = keyMapStore.value[key]?.childrenEventKeys || [];
       let newOpenKeys = mergedOpenKeys.value.filter(k => k !== key);
 
       if (open) {