jQuery.extend(true, Object, Object) copies custom objects correctly.

[jquery.git] / src / core.js

diff --git a/src/core.js b/src/core.js
index 6f8d40f..b51886f 100644 (file)
--- a/src/core.js
+++ b/src/core.js
@@ -243,9 +243,15 @@ jQuery.extend = jQuery.fn.extend = function() {
 
                                // Recurse if we're merging object values
                                if ( deep && copy && typeof copy === "object" && !copy.nodeType ) {
-                                       target[ name ] = jQuery.extend( deep,
-                                               // Never move original objects, clone them
-                                               src || ( jQuery.isArray(copy) ? [ ] : { } ), copy );
+                                       var clone;
+
+                                       if( src ) clone = src;
+                                       else if( jQuery.isArray(copy) ) clone = [ ];
+                                       else if( jQuery.isObject(copy) ) clone = { };
+                                       else clone = copy;
+
+                                       // Never move original objects, clone them
+                                       target[ name ] = jQuery.extend( deep, clone, copy );
 
                                // Don't bring in undefined values
                                } else if ( copy !== undefined ) {
@@ -281,6 +287,10 @@ jQuery.extend({
                return toString.call(obj) === "[object Array]";
        },
 
+       isObject: function( obj ) {
+               return this.constructor.call(obj) === Object;
+       },
+
        // check if an element is in a (or is an) XML document
        isXMLDoc: function( elem ) {
                return elem.nodeType === 9 && elem.documentElement.nodeName !== "HTML" ||