From c13e5cebd2109a2b51541313f05c13613abe5408 Mon Sep 17 00:00:00 2001
From: Anna Peery <42715836+avpeery@users.noreply.github.com>
Date: Tue, 5 Oct 2021 10:20:12 -0700
Subject: [PATCH] Fix conditional check for isFullscreen to accommodate Safari
 (#11086)

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

diff --git a/src/ui/handler/scroll_zoom.js b/src/ui/handler/scroll_zoom.js
index 74084468297..641fab8c471 100644
--- a/src/ui/handler/scroll_zoom.js
+++ b/src/ui/handler/scroll_zoom.js
@@ -391,7 +391,7 @@ class ScrollZoomHandler {
     }
 
     _isFullscreen() {
-        return window.document.fullscreenElement !== null;
+        return !!window.document.fullscreenElement;
     }
 
     _showBlockerAlert() {