From b07fa60d5f723c2f84c3840f9e05768c89c2fd11 Mon Sep 17 00:00:00 2001
From: edison <daiwei521@126.com>
Date: Thu, 20 Nov 2025 22:11:41 +0800
Subject: [PATCH] fix(runtime-vapor): prevent fragment `updated` hooks from
 running before the fragment is mounted. (#14123)

---
 packages/runtime-vapor/src/apiCreateFor.ts | 2 +-
 packages/runtime-vapor/src/fragment.ts     | 3 ++-
 packages/runtime-vapor/src/vdomInterop.ts  | 4 ++--
 3 files changed, 5 insertions(+), 4 deletions(-)

diff --git a/packages/runtime-vapor/src/apiCreateFor.ts b/packages/runtime-vapor/src/apiCreateFor.ts
index 424e892c89..b1841f6dcb 100644
--- a/packages/runtime-vapor/src/apiCreateFor.ts
+++ b/packages/runtime-vapor/src/apiCreateFor.ts
@@ -403,7 +403,7 @@ export const createFor = (
       oldBlocks = []
     }
 
-    if (frag.updated) frag.updated.forEach(m => m())
+    if (isMounted && frag.updated) frag.updated.forEach(m => m())
     setActiveSub(prevSub)
   }
 
diff --git a/packages/runtime-vapor/src/fragment.ts b/packages/runtime-vapor/src/fragment.ts
index df4891c328..96dcf6e7dd 100644
--- a/packages/runtime-vapor/src/fragment.ts
+++ b/packages/runtime-vapor/src/fragment.ts
@@ -191,7 +191,8 @@ export class DynamicFragment extends VaporFragment {
 
       if (parent) {
         insert(this.nodes, parent, this.anchor)
-        if (this.updated) {
+        // anchor isConnected indicates the this render is updated
+        if (this.anchor.isConnected && this.updated) {
           this.updated.forEach(hook => hook(this.nodes))
         }
       }
diff --git a/packages/runtime-vapor/src/vdomInterop.ts b/packages/runtime-vapor/src/vdomInterop.ts
index 3c4a961f0c..7f051e064f 100644
--- a/packages/runtime-vapor/src/vdomInterop.ts
+++ b/packages/runtime-vapor/src/vdomInterop.ts
@@ -383,7 +383,7 @@ function createVDOMComponent(
     }
 
     frag.nodes = vnode.el as any
-    if (frag.updated) frag.updated.forEach(m => m())
+    if (isMounted && frag.updated) frag.updated.forEach(m => m())
   }
 
   frag.remove = unmount
@@ -450,7 +450,7 @@ function renderVDOMSlot(
       }
     }
 
-    if (frag.updated) frag.updated.forEach(m => m())
+    if (isMounted && frag.updated) frag.updated.forEach(m => m())
   }
 
   const render = (parentNode?: ParentNode, anchor?: Node | null) => {
-- 
2.47.3