save a byte

src/attributes.js

@@ -332,7 +332,7 @@ jQuery.extend({
 			ret = elem.getAttribute( name );
 
 			// Non-existent attributes return null, we normalize to undefined
-			return ret === null ?
+			return ret == null ?
 				undefined :
 				ret;
 		}
@@ -565,7 +565,7 @@ if ( !jQuery.support.hrefNormalized ) {
 		jQuery.attrHooks[ name ] = jQuery.extend( jQuery.attrHooks[ name ], {
 			get: function( elem ) {
 				var ret = elem.getAttribute( name, 2 );
-				return ret === null ? undefined : ret;
+				return ret == null ? undefined : ret;
 			}
 		});
 	});