From: Evan You <yyx990803@gmail.com>
Date: Mon, 6 Jul 2020 22:33:13 +0000 (-0400)
Subject: chore: warn NaN vnode key
X-Git-Tag: v3.0.0-beta.19~11
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=31e37b417b4371250a54045a2c03e2520f92cad6;p=thirdparty%2Fvuejs%2Fcore.git

chore: warn NaN vnode key
---

diff --git a/packages/runtime-core/src/vnode.ts b/packages/runtime-core/src/vnode.ts
index f5ff1cdc36..943d43ab37 100644
--- a/packages/runtime-core/src/vnode.ts
+++ b/packages/runtime-core/src/vnode.ts
@@ -383,6 +383,11 @@ function _createVNode(
     appContext: null
   }
 
+  // validate key
+  if (__DEV__ && vnode.key !== vnode.key) {
+    warn(`VNode created with invalid key (NaN). VNode type:`, vnode.type)
+  }
+
   normalizeChildren(vnode, children)
 
   // presence of a patch flag indicates this node needs patching on updates.