From 99a96d3c37d70c0fad842f45bcdf9147c10350aa Mon Sep 17 00:00:00 2001
From: Evan You <yyx990803@gmail.com>
Date: Sat, 28 May 2016 21:05:53 -0400
Subject: [PATCH] should invoke destroy hook for replaced root nodes too

---
 src/core/vdom/patch.js                     | 2 ++
 test/unit/modules/vdom/patch/hooks.spec.js | 6 ++++--
 2 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/src/core/vdom/patch.js b/src/core/vdom/patch.js
index 5d97c442..379c7ab3 100644
--- a/src/core/vdom/patch.js
+++ b/src/core/vdom/patch.js
@@ -383,6 +383,8 @@ export function createPatchFunction (backend) {
         if (parent !== null) {
           nodeOps.insertBefore(parent, vnode.elm, nodeOps.nextSibling(elm))
           removeVnodes(parent, [oldVnode], 0, 0)
+        } else if (isDef(oldVnode.tag)) {
+          invokeDestroyHook(oldVnode)
         }
       }
     }
diff --git a/test/unit/modules/vdom/patch/hooks.spec.js b/test/unit/modules/vdom/patch/hooks.spec.js
index 8d940c6a..adac0cd2 100644
--- a/test/unit/modules/vdom/patch/hooks.spec.js
+++ b/test/unit/modules/vdom/patch/hooks.spec.js
@@ -244,9 +244,10 @@ describe('hooks', () => {
     ])
     const vnode2 = new VNode('div')
     patch1(vnode0, vnode1)
+    expect(destroyed).toBe(1) // should invoke for replaced root nodes too
     patch1(vnode1, vnode2)
     expect(created).toBe(5)
-    expect(destroyed).toBe(4)
+    expect(destroyed).toBe(5)
   })
 
   it('should not invoke `create` and `remove` module hook for text nodes', () => {
@@ -293,9 +294,10 @@ describe('hooks', () => {
     ])
     const vnode2 = new VNode('div')
     patch1(vnode0, vnode1)
+    expect(destroyed).toBe(1) // should invoke for replaced root nodes too
     patch1(vnode1, vnode2)
     expect(created).toBe(5)
-    expect(destroyed).toBe(4)
+    expect(destroyed).toBe(5)
   })
 
   it('should call `create` listener before inserted into parent but after children', () => {