From 7d436ab59a30562a049e199ae579df7ac8066829 Mon Sep 17 00:00:00 2001
From: Evan You <yyx990803@gmail.com>
Date: Sun, 22 Dec 2019 16:24:24 -0500
Subject: [PATCH] fix: mounting new children

---
 packages/runtime-core/src/renderer.ts | 7 +++----
 packages/runtime-core/src/vnode.ts    | 2 +-
 2 files changed, 4 insertions(+), 5 deletions(-)

diff --git a/packages/runtime-core/src/renderer.ts b/packages/runtime-core/src/renderer.ts
index 0b86923e860..69056ccd0b2 100644
--- a/packages/runtime-core/src/renderer.ts
+++ b/packages/runtime-core/src/renderer.ts
@@ -1310,13 +1310,12 @@ export function createRenderer<
         const nextPos = e2 + 1
         const anchor =
           nextPos < l2 ? (c2[nextPos] as HostVNode).el : parentAnchor
-        const n2 = (c2[i] = optimized
-          ? cloneIfMounted(c2[i] as HostVNode)
-          : normalizeVNode(c2[i]))
         while (i <= e2) {
           patch(
             null,
-            n2,
+            (c2[i] = optimized
+              ? cloneIfMounted(c2[i] as HostVNode)
+              : normalizeVNode(c2[i])),
             container,
             anchor,
             parentComponent,
diff --git a/packages/runtime-core/src/vnode.ts b/packages/runtime-core/src/vnode.ts
index 2d34e7c3b02..cab6ce8a994 100644
--- a/packages/runtime-core/src/vnode.ts
+++ b/packages/runtime-core/src/vnode.ts
@@ -355,7 +355,7 @@ export function normalizeVNode<T, U>(child: VNodeChild<T, U>): VNode<T, U> {
 
 // optimized normalization for template-compiled render fns
 export function cloneIfMounted(child: VNode): VNode {
-  return child.el == null ? child : cloneVNode(child)
+  return child.el === null ? child : cloneVNode(child)
 }
 
 export function normalizeChildren(vnode: VNode, children: unknown) {