chore: warn NaN vnode key

2020-07-06 18:33:13 -04:00 · 2020-07-06 18:33:13 -04:00 · 31e37b417b
commit 31e37b417b
parent d86b01ba3a
1 changed files with 5 additions and 0 deletions
--- 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.