From c155ae6c8e01c00d4635eea2606fc394bc6bfeaa Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E6=8C=89=E6=97=B6=E5=90=83=E9=A5=AD?= <1151770629@qq.com>
Date: Thu, 2 Dec 2021 20:49:48 +0800
Subject: [PATCH] =?UTF-8?q?fix:=E5=85=83=E7=B4=A0=E7=9A=84=E5=BC=95?=
 =?UTF-8?q?=E7=94=A8=E9=9C=80=E8=A6=81=E5=9C=A8onMounted=E9=87=8C=E9=9D=A2?=
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---
 packages/vant/docs/markdown/use-rect.zh-CN.md | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/packages/vant/docs/markdown/use-rect.zh-CN.md b/packages/vant/docs/markdown/use-rect.zh-CN.md
index 23f726edb..31e8d4329 100644
--- a/packages/vant/docs/markdown/use-rect.zh-CN.md
+++ b/packages/vant/docs/markdown/use-rect.zh-CN.md
@@ -13,15 +13,18 @@
 ```
 
 ```js
-import { ref } from 'vue';
+import { ref,onMounted } from 'vue';
 import { useRect } from '@vant/use';
 
 export default {
   setup() {
     const root = ref();
-    const rect = useRect(root);
 
-    console.log(rect); // -> 元素的大小及其相对于视口的位置
+    onMounted(()=>{
+      const rect = useRect(root);
+      console.log(rect); // -> 元素的大小及其相对于视口的位置
+    })
+    
 
     return { root };
   },