From 826d4ab33235e3f37ec0258baea9cd448a580508 Mon Sep 17 00:00:00 2001
From: neverland <chenjiahan@youzan.com>
Date: Fri, 17 Sep 2021 20:50:14 +0800
Subject: [PATCH] fix(Collapse): wrapperRef may be undefined (#9505)

---
 packages/vant/src/collapse-item/CollapseItem.tsx | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/packages/vant/src/collapse-item/CollapseItem.tsx b/packages/vant/src/collapse-item/CollapseItem.tsx
index 84146bd65..e076ffdb7 100644
--- a/packages/vant/src/collapse-item/CollapseItem.tsx
+++ b/packages/vant/src/collapse-item/CollapseItem.tsx
@@ -91,7 +91,9 @@ export default defineComponent({
 
           // use double raf to ensure animation can start
           doubleRaf(() => {
-            wrapperRef.value!.style.height = value ? contentHeight : '0';
+            if (wrapperRef.value) {
+              wrapperRef.value.style.height = value ? contentHeight : '0';
+            }
           });
         } else {
           onTransitionEnd();