From fddef8bb742439dc2405e6db198605a3c120c8d8 Mon Sep 17 00:00:00 2001
From: Evan You <yyx990803@gmail.com>
Date: Sat, 26 Jun 2021 21:35:25 -0400
Subject: [PATCH] chore: remove unnecessary casting

---
 packages/runtime-core/src/apiWatch.ts | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/packages/runtime-core/src/apiWatch.ts b/packages/runtime-core/src/apiWatch.ts
index b7092248..34c8deb1 100644
--- a/packages/runtime-core/src/apiWatch.ts
+++ b/packages/runtime-core/src/apiWatch.ts
@@ -175,8 +175,8 @@ function doWatch(
   let isMultiSource = false
 
   if (isRef(source)) {
-    getter = () => (source as Ref).value
-    forceTrigger = !!(source as Ref)._shallow
+    getter = () => source.value
+    forceTrigger = !!source._shallow
   } else if (isReactive(source)) {
     getter = () => source
     deep = true