From d538debb1dec58599ae9f02263b102d0491d198c Mon Sep 17 00:00:00 2001
From: Steve Heffernan <steve@zencoder.com>
Date: Tue, 4 Mar 2014 09:29:09 -0800
Subject: [PATCH 1/2] Added try/catch to protect against IE with no Media
 Player

---
 src/js/media/html5.js | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/src/js/media/html5.js b/src/js/media/html5.js
index bcf54ea4e2..522804b08c 100644
--- a/src/js/media/html5.js
+++ b/src/js/media/html5.js
@@ -237,6 +237,13 @@ vjs.Html5.prototype.defaultMuted = function(){ return this.el_.defaultMuted; };
 /* HTML5 Support Testing ---------------------------------------------------- */
 
 vjs.Html5.isSupported = function(){
+  // ie9 with no Media Player is a LIAR! (#984)
+  try {
+    vjs.TEST_VID['volume'] = 0.5;
+  } catch (e) {
+    return false;
+  }
+
   return !!vjs.TEST_VID.canPlayType;
 };
 
@@ -281,8 +288,13 @@ vjs.Html5.disposeMediaElement = function(el){
   el.removeAttribute('src');
 
   // force the media element to update its loading state by calling load()
+  // however IE on Windows 7N has a bug that throws an error so need a try/catch (#793)
   if (typeof el.load === 'function') {
-    el.load();
+    try {
+      el.load();
+    }
+    catch(e) {
+    }
   }
 };
 

From e4b269e294ecfdbb94ff60ac2f175be072f7696d Mon Sep 17 00:00:00 2001
From: Steve Heffernan <steve@zencoder.com>
Date: Thu, 6 Mar 2014 12:36:36 -0800
Subject: [PATCH 2/2] Added an IIFE to prevent deoptimization

---
 src/js/media/html5.js | 13 ++++++++-----
 1 file changed, 8 insertions(+), 5 deletions(-)

diff --git a/src/js/media/html5.js b/src/js/media/html5.js
index 522804b08c..0ef86fc9b0 100644
--- a/src/js/media/html5.js
+++ b/src/js/media/html5.js
@@ -290,11 +290,14 @@ vjs.Html5.disposeMediaElement = function(el){
   // force the media element to update its loading state by calling load()
   // however IE on Windows 7N has a bug that throws an error so need a try/catch (#793)
   if (typeof el.load === 'function') {
-    try {
-      el.load();
-    }
-    catch(e) {
-    }
+    // wrapping in an iife so it's not deoptimized (#1060#discussion_r10324473)
+    (function() {
+      try {
+        el.load();
+      } catch (e) {
+        // not supported
+      }
+    })();
   }
 };