From b3acd9c9b151b9513745c654a98bdabc88a50d8c Mon Sep 17 00:00:00 2001
From: Jason Buckner <jason@jasonbuckner.com>
Date: Thu, 18 Jul 2013 13:32:33 -0700
Subject: [PATCH 1/2] handle some quirks mode issues IE8 and 9 do not support
 array-style string parsing in quirks mode: "abcdef"[0] returns "" whereas
 "abcdef".substr(0,1) returns "a" document.fireEvent() returns "Invalid
 argument" regardless of the parameters sent to it. This happens in IE8 and
 IE9 in quirks mode.

---
 src/raven.js | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/src/raven.js b/src/raven.js
index 2d5bf81fdf9a..273a4f251f8f 100644
--- a/src/raven.js
+++ b/src/raven.js
@@ -235,7 +235,7 @@ var Raven = {
 function triggerEvent(eventType, options) {
     var event, key;
 
-    eventType = 'raven' + eventType[0].toUpperCase() + eventType.substr(1);
+    eventType = 'raven' + eventType.substr(0,1).toUpperCase() + eventType.substr(1);
 
     if (document.createEvent) {
         event = document.createEvent('HTMLEvents');
@@ -254,9 +254,14 @@ function triggerEvent(eventType, options) {
     }
 
     if (document.createEvent) {
+        // IE9 if standards
         document.dispatchEvent(event);
     } else {
-        document.fireEvent('on' + event.eventType.toLowerCase(), event);
+        // IE8 regardless of Quirks or Standards
+        // IE9 if quirks
+        try {
+            document.fireEvent('on' + event.eventType.toLowerCase(), event);
+        } catch(e) {}
     }
 }
 

From fbb1bdd6a8137ebdc4154efcdddbf2e3a377495b Mon Sep 17 00:00:00 2001
From: Jason Buckner <jason@jasonbuckner.com>
Date: Mon, 22 Jul 2013 10:13:37 -0700
Subject: [PATCH 2/2] change substr() to substring() for performance a jsperf
 comparing the two:
 http://jsperf.com/slice-vs-substr-vs-substring-methods-long-string/14

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

diff --git a/src/raven.js b/src/raven.js
index 273a4f251f8f..c7c8056c3244 100644
--- a/src/raven.js
+++ b/src/raven.js
@@ -235,7 +235,7 @@ var Raven = {
 function triggerEvent(eventType, options) {
     var event, key;
 
-    eventType = 'raven' + eventType.substr(0,1).toUpperCase() + eventType.substr(1);
+    eventType = 'raven' + eventType.substring(0,1).toUpperCase() + eventType.substring(1);
 
     if (document.createEvent) {
         event = document.createEvent('HTMLEvents');