From c0f0350cfc8e778a9369a91f31c3333a15f39589 Mon Sep 17 00:00:00 2001
From: DoomTay <doomtay@gmail.com>
Date: Thu, 5 Jul 2018 16:28:37 -0400
Subject: [PATCH] feat(fullscreen-toggle): disable fs button if fullcreen is
 unavailable (#5296)

Fixes #5290.
---
 src/js/control-bar/fullscreen-toggle.js | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/js/control-bar/fullscreen-toggle.js b/src/js/control-bar/fullscreen-toggle.js
index a565ee3695..45987a78db 100644
--- a/src/js/control-bar/fullscreen-toggle.js
+++ b/src/js/control-bar/fullscreen-toggle.js
@@ -3,6 +3,8 @@
  */
 import Button from '../button.js';
 import Component from '../component.js';
+import FullscreenApi from '../fullscreen-api.js';
+import document from 'global/document';
 
 /**
  * Toggle fullscreen video
@@ -23,6 +25,10 @@ class FullscreenToggle extends Button {
   constructor(player, options) {
     super(player, options);
     this.on(player, 'fullscreenchange', this.handleFullscreenChange);
+
+    if (document[FullscreenApi.fullscreenEnabled] === false) {
+      this.disable();
+    }
   }
 
   /**