From f550c634e385ae4813cb1bee6af910176b2e6a76 Mon Sep 17 00:00:00 2001
From: neverland <chenjiahan@youzan.com>
Date: Thu, 22 Jul 2021 19:53:16 +0800
Subject: [PATCH] fix(@vant/use): invalid watch source (#9095)

---
 packages/vant-use/src/useEventListener/index.ts | 12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)

diff --git a/packages/vant-use/src/useEventListener/index.ts b/packages/vant-use/src/useEventListener/index.ts
index b58e23314..e4ec9f5c5 100644
--- a/packages/vant-use/src/useEventListener/index.ts
+++ b/packages/vant-use/src/useEventListener/index.ts
@@ -1,4 +1,4 @@
-import { Ref, unref, onUnmounted, onDeactivated, watch } from 'vue';
+import { Ref, watch, isRef, unref, onUnmounted, onDeactivated } from 'vue';
 import { onMountedOrActivated } from '../onMountedOrActivated';
 import { inBrowser } from '../utils';
 
@@ -65,8 +65,10 @@ export function useEventListener(
   onDeactivated(() => remove(target));
   onMountedOrActivated(() => add(target));
 
-  watch(target, (val, oldVal) => {
-    remove(oldVal);
-    add(val);
-  });
+  if (isRef(target)) {
+    watch(target, (val, oldVal) => {
+      remove(oldVal);
+      add(val);
+    });
+  }
 }