Now passes in IE8, changed around $.hasAttr and switched the attrHook for selected to be a propHook

src/attributes.js

@@ -278,6 +278,7 @@ jQuery.extend({
 	// TODO: Check to see if any of these are needed anymore?
 	// If not, it may be good to standardize on all-lowercase names instead
 	attrFix: {
+		
 	},
 
 	attr: function( elem, name, value, pass ) {
@@ -295,9 +296,6 @@ jQuery.extend({
 			notxml = elem.nodeType !== 1 || !jQuery.isXMLDoc( elem ),
 			hooks;
 		
-		// Try to normalize/fix the name
-		name = notxml && jQuery.attrFix[ name ] || name;
-		
 		hooks = jQuery.attrHooks[ name ];
 		
 		if ( value !== undefined ) {
@@ -312,9 +310,7 @@ jQuery.extend({
 			} else {
 				// convert the value to a string (all browsers do this but IE) see #1070
 				value = "" + value;
-				
 				elem.setAttribute( name, value );
-				
 				return value;
 			}
 			
@@ -332,14 +328,24 @@ jQuery.extend({
 				var attr = elem.getAttribute( name );
 
 				// Non-existent attributes return null, we normalize to undefined
-				return attr === null ? undefined : attr;
+				return attr === null || attr === "undefined" ? undefined : attr;
 			}
 		}
 	},
 	
 	hasAttr: function( elem, name ) {
-		// Blackberry 4.7 returns "" from getAttribute #6938
+		var inAttrs, attrs = elem.attributes;
-		return elem && elem.attributes[ name ] || (elem.hasAttribute && elem.hasAttribute( name ));
+		
+		if ( elem.hasAttribute ) {
+			return elem.hasAttribute( name );
+		} else {
+			// Browsers do not understand the associative indexes, look for the name in elem.attributes.name
+			for ( var i = 0, l = attrs.length; i < l; i++ ) {
+				if ( attrs[i]["name"] === name ) {
+					return true;
+				}
+			}
+		}
 	},
 	
 	attrHooks: {
@@ -369,9 +375,16 @@ jQuery.extend({
 	
 	// TODO: Check to see if we really need any here.
 	propFix: {
+		
 	},
 	
 	prop: function( elem, name, value ) {
+		
+		// don't get/set properties on text, comment and attribute nodes
+		if ( !elem || elem.nodeType === 3 || elem.nodeType === 8 || elem.nodeType === 2 ) {
+			return undefined;
+		}
+		
 		var ret, hooks, notxml = elem.nodeType !== 1 || !jQuery.isXMLDoc( elem );
 		
 		// Try to normalize/fix the name
@@ -440,13 +453,17 @@ if ( !jQuery.support.style ) {
 // Safari mis-reports the default selected property of an option
 // Accessing the parent's selectedIndex property fixes it
 if ( !jQuery.support.optSelected ) {
-	jQuery.attrHooks.selected = {
+	
+	jQuery.propHooks.selected = {
 		get: function( elem ) {
 			var parent = elem.parentNode;
 			
 			if ( parent ) {
 				parent.selectedIndex;
 				
+				// TODO: We may need an attrHook for selected that simply defers to prop?
+				// The attr is undefined if the option is created with createElement and not on the DOM
+				
 				// Make sure that it also works with optgroups, see #5701
 				if ( parent.parentNode ) {
 					parent.parentNode.selectedIndex;

test/unit/attributes.js

@@ -3,31 +3,6 @@ module("attributes", { teardown: moduleTeardown });
 var bareObj = function(value) { return value; };
 var functionReturningObj = function(value) { return (function() { return value; }); };
 
-// test("jQuery.props: integrity test", function() {
-// 
-//   expect(1);
-// 
-//   //  This must be maintained and equal jQuery.props
-//   //  Ensure that accidental or erroneous property
-//   //  overwrites don't occur
-//   //  This is simply for better code coverage and future proofing.
-//   var propsShouldBe = {
-//     "for": "htmlFor",
-//     "class": "className",
-//     readonly: "readOnly",
-//     maxlength: "maxLength",
-//     cellspacing: "cellSpacing",
-//     rowspan: "rowSpan",
-//     colspan: "colSpan",
-//     tabindex: "tabIndex",
-//     usemap: "useMap",
-//     frameborder: "frameBorder"
-//   };
-// 
-//   same(propsShouldBe, jQuery.props, "jQuery.props passes integrity check");
-// 
-// });
-
 test("prop", function() {
 	equals( jQuery('#text1').prop('value'), "Test", 'Check for value attribute' );
 	equals( jQuery('#text1').prop('value', "Test2").prop('defaultValue'), "Test", 'Check for defaultValue attribute' );
@@ -41,11 +16,12 @@ test("prop", function() {
 	body.foo = 'bar';
 	equals( $body.prop('foo'), 'bar', 'Make sure the expando is preferred over the dom attribute' );
 	body.foo = undefined;
-	ok( $body.attr('foo') === undefined, 'Make sure the expando is preferred over the dom attribute, even if undefined' );
+	ok( $body.prop('foo') === undefined, 'Make sure the expando is preferred over the dom attribute, even if undefined' );
 	
 	var select = document.createElement("select"), optgroup = document.createElement("optgroup"), option = document.createElement("option");
 	optgroup.appendChild( option );
 	select.appendChild( optgroup );
+	
 	equals( jQuery(option).prop("selected"), true, "Make sure that a single option is selected, even when in an optgroup." );
 	equals( jQuery(document).prop("nodeName"), "#document", "prop works correctly on document nodes (bug #7451)." );
 	
@@ -85,7 +61,7 @@ test("attr(String)", function() {
 	// Related to [5574] and [5683]
 	var body = document.body, $body = jQuery(body);
 
-	ok( $body.attr('foo') === undefined, 'Make sure that a non existent attribute returns undefined' );
+	strictEqual( $body.attr('foo'), undefined, 'Make sure that a non existent attribute returns undefined' );
 
 	body.setAttribute('foo', 'baz');
 	equals( $body.attr('foo'), 'baz', 'Make sure the dom attribute is retrieved when no expando is found' );
@@ -119,7 +95,7 @@ if ( !isLocal ) {
 test("attr(String, Function)", function() {
 	expect(2);
 	equals( jQuery('#text1').attr('value', function() { return this.id; })[0].value, "text1", "Set value from id" );
-	equals( jQuery('#text1').attr('title', function(i) { return i }).attr('title'), "0", "Set value with an index");
+	equals( jQuery('#text1').attr('title', function(i) { return i; }).attr('title'), "0", "Set value with an index");
 });
 
 test("attr(Hash)", function() {