From 74ccc8864f2fc0df5dbd61e150d3d1be4fdd93ee Mon Sep 17 00:00:00 2001
From: Libor M <liborm85@gmail.com>
Date: Thu, 30 Jul 2020 11:36:39 +0200
Subject: [PATCH] fixed check window exists #2037

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

diff --git a/src/browser-extensions/URLBrowserResolver.js b/src/browser-extensions/URLBrowserResolver.js
index 7b077a847..ccf921c00 100644
--- a/src/browser-extensions/URLBrowserResolver.js
+++ b/src/browser-extensions/URLBrowserResolver.js
@@ -1,7 +1,7 @@
 'use strict';
 
 // Internet Explorer polyfills
-if (window && !window.Promise) {
+if (typeof window !== 'undefined' && !window.Promise) {
 	require('core-js/features/promise');
 }
 require('core-js/es/object/values');