From 0342fae8ad0e71866e9b9725a1f9c471db775c76 Mon Sep 17 00:00:00 2001
From: Anthony Fu <anthonyfu117@hotmail.com>
Date: Sat, 12 Feb 2022 16:24:19 +0800
Subject: [PATCH] fix(ssr): always hydrate children for HMR (#5406)

fix #5405
---
 packages/runtime-core/src/hydration.ts | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/packages/runtime-core/src/hydration.ts b/packages/runtime-core/src/hydration.ts
index f405aac45fa..ef66f0d3fe6 100644
--- a/packages/runtime-core/src/hydration.ts
+++ b/packages/runtime-core/src/hydration.ts
@@ -273,7 +273,8 @@ export function createHydrationFunctions(
     // e.g. <option :value="obj">, <input type="checkbox" :true-value="1">
     const forcePatchValue = (type === 'input' && dirs) || type === 'option'
     // skip props & children if this is hoisted static nodes
-    if (forcePatchValue || patchFlag !== PatchFlags.HOISTED) {
+    // #5405 in dev, always hydrate children for HMR
+    if (__DEV__ || forcePatchValue || patchFlag !== PatchFlags.HOISTED) {
       if (dirs) {
         invokeDirectiveHook(vnode, null, parentComponent, 'created')
       }