From 33708e8bf44a037070af5c8eabdfe1ccad22bbc2 Mon Sep 17 00:00:00 2001
From: Evan You <yyx990803@gmail.com>
Date: Thu, 1 Jul 2021 17:22:03 -0400
Subject: [PATCH] fix(ssr): ensure behavior consistency between prod/dev when
 mounting SSR app to empty containers

close #4034
---
 packages/runtime-core/src/hydration.ts | 12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)

diff --git a/packages/runtime-core/src/hydration.ts b/packages/runtime-core/src/hydration.ts
index 94c221db19..5f1ed828b2 100644
--- a/packages/runtime-core/src/hydration.ts
+++ b/packages/runtime-core/src/hydration.ts
@@ -57,12 +57,14 @@ export function createHydrationFunctions(
   } = rendererInternals
 
   const hydrate: RootHydrateFunction = (vnode, container) => {
-    if (__DEV__ && !container.hasChildNodes()) {
-      warn(
-        `Attempting to hydrate existing markup but container is empty. ` +
-          `Performing full mount instead.`
-      )
+    if (!container.hasChildNodes()) {
+      __DEV__ &&
+        warn(
+          `Attempting to hydrate existing markup but container is empty. ` +
+            `Performing full mount instead.`
+        )
       patch(null, vnode, container)
+      flushPostFlushCbs()
       return
     }
     hasMismatch = false
-- 
2.47.3