From f9d41ac641dcb5a93ba8a9027476b160d8f41111 Mon Sep 17 00:00:00 2001
From: Richard Gibson <richard.gibson@gmail.com>
Date: Mon, 28 Oct 2013 17:40:13 -0400
Subject: Fix #14379: AJAX requests on unload

---
 src/ajax/xhr.js | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

(limited to 'src/ajax')

diff --git a/src/ajax/xhr.js b/src/ajax/xhr.js
index 8e6696b0d..5dbfc646f 100644
--- a/src/ajax/xhr.js
+++ b/src/ajax/xhr.js
@@ -18,18 +18,16 @@ var xhrSupported = jQuery.ajaxSettings.xhr(),
 		// #1450: sometimes IE returns 1223 when it should be 204
 		1223: 204
 	},
-	// Support: IE9
-	// We need to keep track of outbound xhr and abort them manually
-	// because IE is not smart enough to do it all by itself
 	xhrId = 0,
 	xhrCallbacks = {};
 
+// Support: IE9
+// Open requests must be manually aborted on unload (#5280)
 if ( window.ActiveXObject ) {
 	jQuery( window ).on( "unload", function() {
 		for ( var key in xhrCallbacks ) {
 			xhrCallbacks[ key ]();
 		}
-		xhrCallbacks = undefined;
 	});
 }
 
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