From f4f467811ae4d0c910605f78adb4dcc6911c20f0 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E4=B8=89=E5=92=B2=E6=99=BA=E5=AD=90=20Kevin=20Deng?=
 <sxzz@sxzz.moe>
Date: Wed, 7 Feb 2024 19:47:56 +0800
Subject: [PATCH] fix(runtime-vapor): only update oldValue in beforeUpdate hook

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

diff --git a/packages/runtime-vapor/src/directive.ts b/packages/runtime-vapor/src/directive.ts
index 54c4500c6..43539f647 100644
--- a/packages/runtime-vapor/src/directive.ts
+++ b/packages/runtime-vapor/src/directive.ts
@@ -90,7 +90,7 @@ export function withDirectives<T extends Node>(
       instance,
       source,
       value: null, // set later
-      oldValue: null,
+      oldValue: undefined,
       arg,
       modifiers,
     }
@@ -133,6 +133,7 @@ function callDirectiveHook(
   const hook = dir[name]
   if (!hook) return
 
+  if (name === 'beforeUpdate') binding.oldValue = binding.value
   const newValue = binding.source ? binding.source() : undefined
   binding.value = newValue
   // disable tracking inside all lifecycle hooks
@@ -143,7 +144,6 @@ function callDirectiveHook(
     binding,
   ])
   resetTracking()
-  if (name !== 'beforeUpdate') binding.oldValue = binding.value
 }
 
 export function resolveDirective() {