Made sure that .removeClass(null) doesn't throw an exception. Fixes #3847.

[jquery.git] / src / core.js

diff --git a/src/core.js b/src/core.js
index 6dc4f00..5c37858 100644 (file)
--- a/src/core.js
+++ b/src/core.js
@@ -47,20 +47,16 @@ jQuery.fn = jQuery.prototype = {
                                else {
                                        var elem = document.getElementById( match[3] );
 
-                                       // Make sure an element was located
-                                       if ( elem ){
-                                               // Handle the case where IE and Opera return items
-                                               // by name instead of ID
-                                               if ( elem.id != match[3] )
-                                                       return jQuery().find( selector );
-
-                                               // Otherwise, we inject the element directly into the jQuery object
-                                               var ret = jQuery( elem );
-                                               ret.context = document;
-                                               ret.selector = selector;
-                                               return ret;
-                                       }
-                                       selector = [];
+                                       // Handle the case where IE and Opera return items
+                                       // by name instead of ID
+                                       if ( elem && elem.id != match[3] )
+                                               return jQuery().find( selector );
+
+                                       // Otherwise, we inject the element directly into the jQuery object
+                                       var ret = jQuery( elem || [] );
+                                       ret.context = document;
+                                       ret.selector = selector;
+                                       return ret;
                                }
 
                        // HANDLE: $(expr, [context])
@@ -621,8 +617,8 @@ jQuery.extend({
 
        // check if an element is in a (or is an) XML document
        isXMLDoc: function( elem ) {
-               return elem.documentElement && !elem.body ||
-                       elem.tagName && elem.ownerDocument && !elem.ownerDocument.body;
+               return elem.nodeType === 9 && elem.documentElement.nodeName !== "HTML" ||
+                       !!elem.ownerDocument && jQuery.isXMLDoc( elem.ownerDocument );
        },
 
        // Evalulates a script in a global context
@@ -712,7 +708,7 @@ jQuery.extend({
 
                // internal only, use hasClass("class")
                has: function( elem, className ) {
-                       return jQuery.inArray( className, (elem.className || elem).toString().split(/\s+/) ) > -1;
+                       return elem && jQuery.inArray( className, (elem.className || elem).toString().split(/\s+/) ) > -1;
                }
        },