From 515a155cf66425bd119811bc2d836ff141eb7d5d Mon Sep 17 00:00:00 2001
From: rmontroy <rob.montroy@vai.org>
Date: Wed, 10 Mar 2021 13:48:09 -0500
Subject: [PATCH 1/2] Remove support for IE < 11

---
 src/openseadragon.js | 47 +++-----------------------------------------
 1 file changed, 3 insertions(+), 44 deletions(-)

diff --git a/src/openseadragon.js b/src/openseadragon.js
index 1f7fbe60..f61e0133 100644
--- a/src/openseadragon.js
+++ b/src/openseadragon.js
@@ -2298,40 +2298,8 @@ function OpenSeadragon( options ){
 
                 request.onreadystatechange = function(){};
 
-                if (window.XDomainRequest) { // IE9 or IE8 might as well try to use XDomainRequest
-                    var xdr = new window.XDomainRequest();
-                    if (xdr) {
-                        xdr.onload = function (e) {
-                            if ( $.isFunction( onSuccess ) ) {
-                                onSuccess({ // Faking an xhr object
-                                    responseText: xdr.responseText,
-                                    status: 200, // XDomainRequest doesn't support status codes, so we just fake one! :/
-                                    statusText: 'OK'
-                                });
-                            }
-                        };
-                        xdr.onerror = function (e) {
-                            if ($.isFunction(onError)) {
-                                onError({ // Faking an xhr object
-                                    responseText: xdr.responseText,
-                                    status: 444, // 444 No Response
-                                    statusText: 'An error happened. Due to an XDomainRequest deficiency we can not extract any information about this error. Upgrade your browser.'
-                                });
-                            }
-                        };
-                        try {
-                            xdr.open('GET', url);
-                            xdr.send();
-                        } catch (e2) {
-                            if ( $.isFunction( onError ) ) {
-                                onError( request, e );
-                            }
-                        }
-                    }
-                } else {
-                    if ( $.isFunction( onError ) ) {
-                        onError( request, e );
-                    }
+                if ( $.isFunction( onError ) ) {
+                    onError( request, e );
                 }
             }
 
@@ -2470,16 +2438,7 @@ function OpenSeadragon( options ){
          * @returns {Object}
          */
         parseJSON: function(string) {
-            if (window.JSON && window.JSON.parse) {
-                $.parseJSON = window.JSON.parse;
-            } else {
-                // Should only be used by IE8 in non standards mode
-                $.parseJSON = function(string) {
-                    /*jshint evil:true*/
-                    //eslint-disable-next-line no-eval
-                    return eval('(' + string + ')');
-                };
-            }
+            $.parseJSON = window.JSON.parse;
             return $.parseJSON(string);
         },
 

From a96e369c0f3f71833c2540416709f84adf120f53 Mon Sep 17 00:00:00 2001
From: Rob Montroy <rob.montroy@vai.org>
Date: Wed, 10 Mar 2021 19:04:07 -0500
Subject: [PATCH 2/2] Changelog update

---
 changelog.txt | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/changelog.txt b/changelog.txt
index 1c325eba..38fcc2d4 100644
--- a/changelog.txt
+++ b/changelog.txt
@@ -34,7 +34,7 @@ OPENSEADRAGON CHANGELOG
 * MouseTracker: added contextMenuHandler option for handling contextmenu events (#1872 @msalsbery)
 * Viewer: added a canvas-contextmenu event (#1872 @msalsbery)
 * Added additional documentation for the zoomPerSecond viewer option (#1872 @msalsbery)
-* MouseTracker: Per #1863, dropped support for Internet Explorer < 11 (#1872 @msalsbery)
+* MouseTracker: Per #1863, dropped support for Internet Explorer < 11 (#1872 @msalsbery) (#1950 @rmontroy)
 * Fixed simulated drag events in navigator tests (#1949 @msalsbery)
 
 2.4.2: