From 141ecf221b553925a2266058c649c2262c2ee5aa Mon Sep 17 00:00:00 2001
From: Gary Katsevman <git@gkatsev.com>
Date: Mon, 22 Aug 2016 14:20:23 -0400
Subject: [PATCH] @gkatsev made videojs requirable in node. closes #3540

---
 src/js/player.js    | 2 +-
 src/js/utils/dom.js | 5 ++++-
 src/js/video.js     | 4 +++-
 3 files changed, 8 insertions(+), 3 deletions(-)

diff --git a/src/js/player.js b/src/js/player.js
index 0f58266d7..86053970c 100644
--- a/src/js/player.js
+++ b/src/js/player.js
@@ -2937,7 +2937,7 @@ Player.prototype.options_ = {
     'textTrackSettings'
   ],
 
-  language: navigator.languages && navigator.languages[0] || navigator.userLanguage || navigator.language || 'en',
+  language: navigator && (navigator.languages && navigator.languages[0] || navigator.userLanguage || navigator.language) || 'en',
 
   // locales and their language translations
   languages: {},
diff --git a/src/js/utils/dom.js b/src/js/utils/dom.js
index 66fe9f597..90f497303 100644
--- a/src/js/utils/dom.js
+++ b/src/js/utils/dom.js
@@ -67,7 +67,10 @@ function createQuerier(method) {
     if (isNonBlankString(context)) {
       context = document.querySelector(context);
     }
-    return (isEl(context) ? context : document)[method](selector);
+
+    const ctx = isEl(context) ? context : document;
+
+    return ctx[method] && ctx[method](selector);
   };
 }
 
diff --git a/src/js/video.js b/src/js/video.js
index 92e358d16..28638cd15 100644
--- a/src/js/video.js
+++ b/src/js/video.js
@@ -108,7 +108,9 @@ if (window.VIDEOJS_NO_DYNAMIC_STYLE !== true) {
     style = stylesheet.createStyleElement('vjs-styles-defaults');
     const head = Dom.$('head');
 
-    head.insertBefore(style, head.firstChild);
+    if (head) {
+      head.insertBefore(style, head.firstChild);
+    }
     stylesheet.setTextContent(style, `
       .video-js {
         width: 300px;