From 1a231e4bee0e422b605f7454b697bd078e17ba3d Mon Sep 17 00:00:00 2001
From: =?utf8?q?=C5=81ukasz?= <lukasz.zdanikowski@gmail.com>
Date: Mon, 8 Jan 2018 13:15:22 +0100
Subject: [PATCH] Check for window before window.QUnit (#25199)

---
 js/src/util.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/js/src/util.js b/js/src/util.js
index 14653c86e0..0ffbb76a3e 100644
--- a/js/src/util.js
+++ b/js/src/util.js
@@ -39,7 +39,7 @@ const Util = (($) => {
   }
 
   function transitionEndTest() {
-    if (window.QUnit) {
+    if (typeof window !== 'undefined' && window.QUnit) {
       return false
     }
 
-- 
2.47.2