Fix #12048. Set attributes for XML fragments. Close gh-965.

src/attributes.js

@@ -523,7 +523,7 @@ if ( !getSetAttribute ) {
 			// Set the existing or create a new attribute node
 			var ret = elem.getAttributeNode( name );
 			if ( !ret ) {
-				ret = document.createAttribute( name );
+				ret = elem.ownerDocument.createAttribute( name );
 				elem.setAttributeNode( ret );
 			}
 			return ( ret.value = value + "" );

test/.jshintrc

@@ -41,6 +41,7 @@
     "testIframe": true,
     "testIframeWithCallback": true,
     "createDashboardXML": true,
+    "createXMLFragment": true,
     "moduleTeardown": true,
     "testFoo": true,
     "foobar": true,

test/data/testinit.js

@@ -102,6 +102,21 @@ var createWithFriesXML = function() {
 	return jQuery.parseXML(string);
 };
 
+var createXMLFragment = function() {
+	var xml, frag;
+	if ( window.ActiveXObject ) {
+		xml = new ActiveXObject("msxml2.domdocument");
+	} else {
+		xml = document.implementation.createDocument( "", "", null );
+	}
+
+	if ( xml ) {
+		frag = xml.createElement("data");
+	}
+
+	return frag;
+};
+
 var fireNative;
 if ( document.createEvent ) {
 	fireNative = function( node, type ) {

test/unit/attributes.js

@@ -522,6 +522,17 @@ test( "attr(String, Object) - Loaded via XML document", function() {
 	equal( titles[ 1 ], "Users", "attr() in XML context: Check second title" );
 });
 
+test( "attr(String, Object) - Loaded via XML fragment", function() {
+	expect( 2 );
+	var frag = createXMLFragment(),
+		$frag = jQuery( frag );
+
+	$frag.attr( "test", "some value" );
+	equal( $frag.attr("test"), "some value", "set attribute" );
+	$frag.attr( "test", null );
+	equal( $frag.attr("test"), undefined, "remove attribute" );
+});
+
 test( "attr('tabindex')", function() {
 	expect( 8 );