From dd40ad8fca47af0e1f0a963be2f48c23f7457952 Mon Sep 17 00:00:00 2001
From: Evan You <yyx990803@gmail.com>
Date: Wed, 16 Sep 2020 13:01:53 -0400
Subject: [PATCH] fix(runtime-core): should still do full traverse of stable
 fragment children in dev + hmr

---
 packages/runtime-core/src/renderer.ts | 12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)

diff --git a/packages/runtime-core/src/renderer.ts b/packages/runtime-core/src/renderer.ts
index 6d01e3e5147..64d2d3c379f 100644
--- a/packages/runtime-core/src/renderer.ts
+++ b/packages/runtime-core/src/renderer.ts
@@ -1155,11 +1155,13 @@ function baseCreateRenderer(
           parentSuspense,
           isSVG
         )
-        // #2080 if the stable fragment has a key, it's a <template v-for> that may
-        //  get moved around. Make sure all root level vnodes inherit el.
-        // #2134 or if it's a component root, it may also get moved around
-        // as the component is being moved.
-        if (
+        if (__DEV__ && parentComponent && parentComponent.type.__hmrId) {
+          traverseStaticChildren(n1, n2)
+        } else if (
+          // #2080 if the stable fragment has a key, it's a <template v-for> that may
+          //  get moved around. Make sure all root level vnodes inherit el.
+          // #2134 or if it's a component root, it may also get moved around
+          // as the component is being moved.
           n2.key != null ||
           (parentComponent && n2 === parentComponent.subTree)
         ) {