From d3df25270d36e8d1838b6a7fe0a581e5c4e51972 Mon Sep 17 00:00:00 2001
From: Artur Arseniev <artur.catch@hotmail.it>
Date: Thu, 20 Dec 2018 00:27:14 +0100
Subject: [PATCH] Check if fullscreen is active before running
 `exitFullscreen`. Fixes #1667

---
 src/commands/view/Fullscreen.js | 12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)

diff --git a/src/commands/view/Fullscreen.js b/src/commands/view/Fullscreen.js
index df0a65b7e..79496c870 100644
--- a/src/commands/view/Fullscreen.js
+++ b/src/commands/view/Fullscreen.js
@@ -39,11 +39,13 @@ module.exports = {
    * Disable fullscreen mode
    */
   disable() {
-    var d = document;
-    if (d.exitFullscreen) d.exitFullscreen();
-    else if (d.webkitExitFullscreen) d.webkitExitFullscreen();
-    else if (d.mozCancelFullScreen) d.mozCancelFullScreen();
-    else if (d.msExitFullscreen) d.msExitFullscreen();
+    const d = document;
+    if (this.isEnabled()) {
+      if (d.exitFullscreen) d.exitFullscreen();
+      else if (d.webkitExitFullscreen) d.webkitExitFullscreen();
+      else if (d.mozCancelFullScreen) d.mozCancelFullScreen();
+      else if (d.msExitFullscreen) d.msExitFullscreen();
+    }
   },
 
   /**