Make a new jQuery.support.noCloneChecked - splitting apart the previous feature detect relating to clone in IE, fixes the last remaining issue with IE 9 RC. Fixes #8365.

Author: jeresig

src/manipulation.js

@@ -489,14 +489,27 @@ jQuery.each({
 	};
 });
 
+function getAll( elem ) {
+	if ( "getElementsByTagName" in elem ) {
+		return elem.getElementsByTagName( "*" );
+	
+	} else if ( "querySelectorAll" in elem ) {
+		return elem.querySelectorAll( "*" );
+
+	} else {
+		return [];
+	}
+}
+
 jQuery.extend({
 	clone: function( elem, dataAndEvents, deepDataAndEvents ) {
 		var clone = elem.cloneNode(true),
 				srcElements,
 				destElements,
 				i;
 
-		if ( !jQuery.support.noCloneEvent && (elem.nodeType === 1 || elem.nodeType === 11) && !jQuery.isXMLDoc(elem) ) {
+		if ( (!jQuery.support.noCloneEvent || !jQuery.support.noCloneChecked) &&
+				(elem.nodeType === 1 || elem.nodeType === 11) && !jQuery.isXMLDoc(elem) ) {
 			// IE copies events bound via attachEvent when using cloneNode.
 			// Calling detachEvent on the clone will also remove the events
 			// from the original. In order to get around this, we use some
@@ -507,8 +520,8 @@ jQuery.extend({
 
 			// Using Sizzle here is crazy slow, so we use getElementsByTagName
 			// instead
-			srcElements = elem.getElementsByTagName("*");
-			destElements = clone.getElementsByTagName("*");
+			srcElements = getAll( elem );
+			destElements = getAll( clone );
 
 			// Weird iteration because IE will replace the length property
 			// with an element if you are cloning the body and one of the
@@ -520,21 +533,18 @@ jQuery.extend({
 
 		// Copy the events from the original to the clone
 		if ( dataAndEvents ) {
-
 			cloneCopyEvent( elem, clone );
 
-			if ( deepDataAndEvents && "getElementsByTagName" in elem ) {
-
-				srcElements = elem.getElementsByTagName("*");
-				destElements = clone.getElementsByTagName("*");
+			if ( deepDataAndEvents ) {
+				srcElements = getAll( elem );
+				destElements = getAll( clone );
 
-				if ( srcElements.length ) {
-					for ( i = 0; srcElements[i]; ++i ) {
-						cloneCopyEvent( srcElements[i], destElements[i] );
-					}
+				for ( i = 0; srcElements[i]; ++i ) {
+					cloneCopyEvent( srcElements[i], destElements[i] );
 				}
 			}
 		}
+
 		// Return the cloned set
 		return clone;
 },

src/support.js

@@ -12,7 +12,8 @@
 	var all = div.getElementsByTagName("*"),
 		a = div.getElementsByTagName("a")[0],
 		select = document.createElement("select"),
-		opt = select.appendChild( document.createElement("option") );
+		opt = select.appendChild( document.createElement("option") ),
+		input = div.getElementsByTagName("input")[0];
 
 	// Can't get basic test support
 	if ( !all || !all.length || !a ) {
@@ -51,7 +52,7 @@
 		// Make sure that if no value is specified for a checkbox
 		// that it defaults to "on".
 		// (WebKit defaults to "" instead)
-		checkOn: div.getElementsByTagName("input")[0].value === "on",
+		checkOn: input.value === "on",
 
 		// Make sure that a selected-by-default option has a working selected property.
 		// (WebKit defaults to false instead of true, IE too, if it's in an optgroup)
@@ -62,12 +63,16 @@
 		optDisabled: false,
 		checkClone: false,
 		noCloneEvent: true,
+		noCloneChecked: true,
 		boxModel: null,
 		inlineBlockNeedsLayout: false,
 		shrinkWrapBlocks: false,
 		reliableHiddenOffsets: true
 	};
 
+	input.checked = true;
+	jQuery.support.noCloneChecked = input.cloneNode( true ).checked;
+
 	// Make sure that the options inside disabled selects aren't marked as disabled
 	// (WebKit marks them as diabled)
 	select.disabled = true;

test/unit/manipulation.js

@@ -402,15 +402,16 @@ test("append(Function) with incoming value", function() {
 });
 
 test("append the same fragment with events (Bug #6997, 5566)", function () {
-	expect(2 + (document.fireEvent ? 1 : 0));
+	var doExtra = !jQuery.support.noCloneEvent && document.fireEvent;
+	expect(2 + (doExtra ? 1 : 0));
 	stop(1000);
 
 	var element;
 
 	// This patch modified the way that cloning occurs in IE; we need to make sure that
 	// native event handlers on the original object don't get disturbed when they are
 	// modified on the clone
-	if (!jQuery.support.noCloneEvent && document.fireEvent) {
+	if ( doExtra ) {
 		element = jQuery("div:first").click(function () {
 			ok(true, "Event exists on original after being unbound on clone");
 			jQuery(this).unbind('click');
@@ -1015,7 +1016,7 @@ test("clone(form element) (Bug #3879, #6655)", function() {
 
 	equals( clone.is(":checked"), element.is(":checked"), "Checked input cloned correctly" );
 	equals( clone[0].defaultValue, "foo", "Checked input defaultValue cloned correctly" );
-	equals( clone[0].defaultChecked, !jQuery.support.noCloneEvent, "Checked input defaultChecked cloned correctly" );
+	equals( clone[0].defaultChecked, !jQuery.support.noCloneChecked, "Checked input defaultChecked cloned correctly" );
 
 	element = jQuery("<input type='text' value='foo'>");
 	clone = element.clone();