From 6008449e07d39f9be1cde6f3fbc7858fd43a877e Mon Sep 17 00:00:00 2001
From: Peter Mulholland <Peter.Mulholland@bentley.com>
Date: Thu, 23 Apr 2020 16:08:48 -0400
Subject: [PATCH] Add undefined check for navigator.userAgent

---
 src/ol/has.js | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/ol/has.js b/src/ol/has.js
index d77ba96073..6599060d34 100644
--- a/src/ol/has.js
+++ b/src/ol/has.js
@@ -3,7 +3,9 @@
  */
 
 const ua =
-  typeof navigator !== 'undefined' ? navigator.userAgent.toLowerCase() : '';
+  typeof navigator !== 'undefined' && typeof navigator.userAgent !== 'undefined' 
+    ? navigator.userAgent.toLowerCase() 
+    : '';
 
 /**
  * User agent string says we are dealing with Firefox as browser.