Fix #10773. Improve parameter handling in removeAttr.

src/attributes.js

@@ -355,12 +355,12 @@ jQuery.extend({
 		var propName, attrNames, name, l,
 			i = 0;
 
-		if ( elem.nodeType === 1 ) {
-			attrNames = ( value || "" ).split( rspace );
+		if ( value && typeof value === "string" && elem.nodeType === 1 ) {
+			attrNames = jQuery.trim( value ).toLowerCase().split( " " );
 			l = attrNames.length;
 
 			for ( ; i < l; i++ ) {
-				name = attrNames[ i ].toLowerCase();
+				name = attrNames[ i ];
 				propName = jQuery.propFix[ name ] || name;
 
 				// See #9699 for explanation of this approach (setting first, then removal)

test/unit/attributes.js

@@ -481,6 +481,41 @@ test("removeAttr(String)", function() {
 	}
 });
 
+test("removeAttr, #", function() {
+
+	var div = jQuery("<div />");
+
+	ok( div.removeAttr( "" ), "empty string" );
+	ok( div.removeAttr(), "nothing" );
+	ok( div.removeAttr( false ), "false" );
+	ok( div.removeAttr( true ), "true" );
+	ok( div.removeAttr({ }), "object" );
+	ok( div.removeAttr( function(){} ), "function" );
+
+});
+
+test("removeAttr(Multi String)", function() {
+	expect(8);
+
+	var div = jQuery("<div id='a' alt='b' title='c' rel='d'></div>"),
+		tests = {
+			id: "a",
+			alt: "b",
+			title: "c",
+			rel: "d"
+		};
+
+	jQuery.each( tests, function( key, val ) {
+		equal( div.attr(key), val, "Attribute `" + key + "` exists, and has a value of `" + val + "`" );
+	});
+
+	div.removeAttr( "id alt title rel " );
+
+	jQuery.each( tests, function( key, val ) {
+		equal( div.attr(key), undefined, "Attribute `" + key + "` was removed" );
+	});
+});
+
 test("prop(String, Object)", function() {
 	expect(31);
 
@@ -548,28 +583,6 @@ test("prop(String, Object)", function() {
 	equal( $form.prop("enctype"), "multipart/form-data", "Set the enctype of a form (encoding in IE6/7 #6743)" );
 });
 
-test("removeAttr(Multi String)", function() {
-	expect(8);
-
-	var div = jQuery("<div id='a' alt='b' title='c' rel='d'></div>"),
-		tests = {
-			id: "a",
-			alt: "b",
-			title: "c",
-			rel: "d"
-		};
-
-	jQuery.each( tests, function( key, val ) {
-		equal( div.attr(key), val, "Attribute `" + key + "` exists, and has a value of `" + val + "`" );
-	});
-
-	div.removeAttr( "id alt title rel" );
-
-	jQuery.each( tests, function( key, val ) {
-		equal( div.attr(key), undefined, "Attribute `" + key + "` was removed" );
-	});
-});
-
 test("prop('tabindex')", function() {
 	expect(8);