From 8d4f178dcccf0ee6261692ab62dbbb69c9f9e65b Mon Sep 17 00:00:00 2001
From: daiwei <daiwei521@126.com>
Date: Thu, 31 Jul 2025 21:13:01 +0800
Subject: [PATCH] wip: skip hydration for empty forwarded slots

---
 packages/runtime-vapor/src/componentSlots.ts |  2 +-
 packages/runtime-vapor/src/fragment.ts       | 10 ++++++++++
 2 files changed, 11 insertions(+), 1 deletion(-)

diff --git a/packages/runtime-vapor/src/componentSlots.ts b/packages/runtime-vapor/src/componentSlots.ts
index 9ae3bd249..3b4adeed9 100644
--- a/packages/runtime-vapor/src/componentSlots.ts
+++ b/packages/runtime-vapor/src/componentSlots.ts
@@ -136,7 +136,7 @@ export function createSlot(
     )
   } else {
     fragment =
-      (isHydrating || __DEV__) && !i
+      isHydrating || __DEV__
         ? new DynamicFragment(SLOT_ANCHOR_LABEL)
         : new DynamicFragment()
     const isDynamicName = isFunction(name)
diff --git a/packages/runtime-vapor/src/fragment.ts b/packages/runtime-vapor/src/fragment.ts
index b978298a6..f21ac9b57 100644
--- a/packages/runtime-vapor/src/fragment.ts
+++ b/packages/runtime-vapor/src/fragment.ts
@@ -139,7 +139,17 @@ export class DynamicFragment extends VaporFragment {
     }
 
     setActiveSub(prevSub)
+
     if (isHydrating && this.anchorLabel) {
+      // skip hydration for empty forwarded slots because
+      // the server output does not include their anchors
+      if (
+        this.nodes instanceof DynamicFragment &&
+        this.nodes.forwarded &&
+        !isValidBlock(this.nodes)
+      ) {
+        return
+      }
       this.hydrate(this.anchorLabel)
     }
   }