From f33c54cb8361dd07806b133adb74df188f08f7bb Mon Sep 17 00:00:00 2001
From: Doug Yun <doug.yun@dockyard.com>
Date: Thu, 28 Apr 2016 09:50:26 -0700
Subject: [PATCH] Update `session-stores/cookie` with `typeof` guard (#1)

---
 addon/session-stores/cookie.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/addon/session-stores/cookie.js b/addon/session-stores/cookie.js
index 8adfa6fd2..67a7d5123 100644
--- a/addon/session-stores/cookie.js
+++ b/addon/session-stores/cookie.js
@@ -105,7 +105,7 @@ export default BaseStore.extend({
     if (this.get('_fastboot.isFastBoot')) {
       return false;
     } else {
-      const visibilityState = document.visibilityState || 'visible';
+      const visibilityState = typeof document !== 'undefined' ? document.visibilityState || 'visible';
       return visibilityState === 'visible';
     }
   }).volatile(),