Merge pull request #2062 from jesdaigle/remove-IE-support

* remove IE references

* Remove try/catch for constructible events

* Remove unneeded reference to Firefox

Co-authored-by: Simon Pieters <[email protected]>

Author: jesdaigle

aria-practices-DeletedSectionsArchive.html

@@ -739,7 +739,7 @@ <h4>Keyboard Interaction</h4>
             <ul>
               <li>Posts the Popup Help widget. </li>
               <li>Input focus is placed on the first interactive element in the Popup Help. </li>
-              <li class="note">Control F1 is used by IE to "Display a help dialog box". In IE7 and IE8 <code>event.cancelBubble=true;</code> and <code>event.returnValue=false;</code> will allow the re-purposing of keys used by the browser. In the case of IE6, you can not stop the bubble up of keys used by the browser, but can stop the bubble up to the OS. In the case of Firefox and other standard compliant browsers, <code>event.stopPropagation();</code> and <code>event.preventDefault();</code> will re-purpose the keys. </li>
+              <li class="note"><code>event.stopPropagation();</code> and <code>event.preventDefault();</code> will re-purpose the keys. </li>
               <li class="note">With the exception of Control F1 to bring up Popup Help this widget is very similar to <a href="#dialog_modal">Dialog (Modal)</a> and/or <a href="#dialog_nonmodal">Dialog (Non-Modal)</a> and/or <a href="#dialog_tooltip">Dialog (tooltip)</a> described elsewhere in this document. </li>
             </ul>
           </li>

common/css/slices.css

@@ -76,10 +76,10 @@ div.slices_footer {
 }
 * html .slices_skipnav {
 	display: block
-} /*Switch on for IE6 and below*/
+}
 *+html .slices_skipnav {
 	display: block
-} /*Switch on for IE7*/
+}
 :root .slices_skipnav {
 	display: block
 } /*Switch on for Moz, FF and Safari*/
@@ -111,7 +111,7 @@ div.slices_footer {
 	border: solid #777 2px;
 	color: #fff;
 	background: #333 !important
-} /*Note IE bug that requires use of :active to mimic effect of :focus*/
+}
 .slices_skipnav a:hover {
 	cursor: default
 }

examples/treegrid/js/treegrid-1.js

@@ -7,7 +7,6 @@ function TreeGrid(treegridElem, doAllowRowFocus, doStartRowFocus) {
 
     // Add tabindex="0" to first row, "-1" to other rows
     // We will use the roving tabindex method since aria-activedescendant
-    // does not work in IE
     var rows = getAllRows();
     var index = rows.length;
     var startRowIndex = doStartRowFocus ? 0 : -1;

examples/treeview/treeview-1/js/treeitem.js

@@ -135,19 +135,11 @@ Treeitem.prototype.handleKeydown = function (event) {
       case this.keyCode.RETURN:
         // Create simulated mouse event to mimic the behavior of ATs
         // and let the event handler handleClick do the housekeeping.
-        try {
-          clickEvent = new MouseEvent('click', {
-            view: window,
-            bubbles: true,
-            cancelable: true,
-          });
-        } catch (err) {
-          if (document.createEvent) {
-            // DOM Level 3 for IE 9+
-            clickEvent = document.createEvent('MouseEvents');
-            clickEvent.initEvent('click', true, true);
-          }
-        }
+        clickEvent = new MouseEvent('click', {
+          view: window,
+          bubbles: true,
+          cancelable: true,
+        });
         tgt.dispatchEvent(clickEvent);
         flag = true;
         break;