From: Evan You <evan@vuejs.org>
Date: Wed, 12 Feb 2025 00:58:22 +0000 (+0800)
Subject: perf(vapor): optimize v-if in once mode
X-Git-Tag: v3.6.0-alpha.1~16^2~66
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=222ced28758537bfe9561c68d57a38564af74ab2;p=thirdparty%2Fvuejs%2Fcore.git

perf(vapor): optimize v-if in once mode
---

diff --git a/packages/runtime-vapor/src/apiCreateIf.ts b/packages/runtime-vapor/src/apiCreateIf.ts
index e403531393..947935f88b 100644
--- a/packages/runtime-vapor/src/apiCreateIf.ts
+++ b/packages/runtime-vapor/src/apiCreateIf.ts
@@ -1,4 +1,4 @@
-import { type BlockFn, DynamicFragment } from './block'
+import { type Block, type BlockFn, DynamicFragment } from './block'
 import { renderEffect } from './renderEffect'
 
 export function createIf(
@@ -7,12 +7,12 @@ export function createIf(
   b2?: BlockFn,
   once?: boolean,
   // hydrationNode?: Node,
-): DynamicFragment {
-  const frag = __DEV__ ? new DynamicFragment('if') : new DynamicFragment()
+): Block {
   if (once) {
-    frag.update(condition() ? b1 : b2)
+    return condition() ? b1() : b2 ? b2() : []
   } else {
+    const frag = __DEV__ ? new DynamicFragment('if') : new DynamicFragment()
     renderEffect(() => frag.update(condition() ? b1 : b2))
+    return frag
   }
-  return frag
 }