From bc6ac6974269c95417317f4468cc5c293456f07d Mon Sep 17 00:00:00 2001
From: maxbittker <maxbittker@gmail.com>
Date: Fri, 2 Mar 2018 10:13:15 -0800
Subject: [PATCH] window defensiveness

---
 src/raven.js | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/raven.js b/src/raven.js
index 11d9532b786a..c43abeeab5f2 100644
--- a/src/raven.js
+++ b/src/raven.js
@@ -431,7 +431,7 @@ Raven.prototype = {
    */
   _attachPromiseRejectionHandler: function() {
     this._promiseRejectionHandler = this._promiseRejectionHandler.bind(this);
-    _window.addEventListener('unhandledrejection', this._promiseRejectionHandler);
+    _window.addEventListener && _window.addEventListener('unhandledrejection', this._promiseRejectionHandler);
     return this;
   },
 
@@ -441,7 +441,7 @@ Raven.prototype = {
    * @return {raven}
    */
   _detachPromiseRejectionHandler: function() {
-    _window.removeEventListener('unhandledrejection', this._promiseRejectionHandler);
+    _window.removeEventListener && _window.removeEventListener('unhandledrejection', this._promiseRejectionHandler);
     return this;
   },