From 0f0efffe216e171a2fda098a0696ba673a96459f Mon Sep 17 00:00:00 2001
From: David Johnson <djohnson.m@gmail.com>
Date: Mon, 26 Mar 2018 04:06:43 +0000
Subject: [PATCH] Check for undefined in hasKeys

---
 jsbits/diff.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/jsbits/diff.js b/jsbits/diff.js
index 3fa7eb0e..dc443404 100644
--- a/jsbits/diff.js
+++ b/jsbits/diff.js
@@ -139,7 +139,7 @@ function diffCss(cCss, nCss, node) {
 }
 
 function hasKeys(ns, cs) {
-    return ns.length > 0 && cs.length > 0 && ns[0].key !== null && cs[0].key !== null;
+    return ns.length > 0 && cs.length > 0 && ns[0].key != null && cs[0].key != null;
 }
 
 function diffChildren(cs, ns, parent, doc) {