From 1e9062c0756b4dfb00d5d03e05515e32207c381a Mon Sep 17 00:00:00 2001
From: Evan You <evan@vuejs.org>
Date: Wed, 29 Jan 2025 15:45:54 +0800
Subject: [PATCH] refactor(reactivity): avoid setting up debug flags on falsy
 onTrigger value

---
 packages/reactivity/src/debug.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/packages/reactivity/src/debug.ts b/packages/reactivity/src/debug.ts
index 7e96f24ea..aa7c87c95 100644
--- a/packages/reactivity/src/debug.ts
+++ b/packages/reactivity/src/debug.ts
@@ -55,7 +55,7 @@ export function setupOnTrigger(target: { new (...args: any[]): any }): void {
       return this._onTrigger
     },
     set(val) {
-      if (!this._onTrigger) setupFlagsHandler(this)
+      if (val && !this._onTrigger) setupFlagsHandler(this)
       this._onTrigger = val
     },
   })