Made jQuery.extend(true, ...) to extend recursively only 'object literal' values.

diff --git a/src/core.js b/src/core.js
index 1d5a25b..b821336 100644 (file)
--- a/src/core.js
+++ b/src/core.js
@@ -272,19 +272,10 @@ jQuery.extend = jQuery.fn.extend = function() {
                                        continue;
                                }
 
-                               // Recurse if we're merging object values
-                               if ( deep && copy && typeof copy === "object" && !copy.nodeType ) {
-                                       var clone;
-
-                                       if ( src ) {
-                                               clone = src;
-                                       } else if ( jQuery.isArray(copy) ) {
-                                               clone = [];
-                                       } else if ( jQuery.isObjectLiteral(copy) ) {
-                                               clone = {};
-                                       } else {
-                                               clone = copy;
-                                       }
+                               // Recurse if we're merging object literal values
+                               if ( deep && copy && jQuery.isObjectLiteral(copy) ) {
+                                       // Don't extend not object literals
+                                       var clone = src && jQuery.isObjectLiteral(src) ? src : {};
 
                                        // Never move original objects, clone them
                                        target[ name ] = jQuery.extend( deep, clone, copy );

diff --git a/test/unit/core.js b/test/unit/core.js
index b355a8c..9b43c48 100644 (file)
--- a/test/unit/core.js
+++ b/test/unit/core.js
@@ -553,16 +553,20 @@ test("jQuery.extend(Object, Object)", function() {
        same( empty.foo, optionsWithDate.foo, "Dates copy correctly" );
 
        var myKlass = function() {};
-       var optionsWithCustomObject = { foo: { date: new myKlass } };
+       var customObject = new myKlass();
+       var optionsWithCustomObject = { foo: { date: new customObject } };
        empty = {};
        jQuery.extend(true, empty, optionsWithCustomObject);
-       same( empty.foo, optionsWithCustomObject.foo, "Custom objects copy correctly (no methods)" );
+       ok( empty.foo && empty.foo.date && empty.foo.date === customObject, "Custom objects copy correctly (no methods)" );
        
        // Makes the class a little more realistic
        myKlass.prototype = { someMethod: function(){} };
        empty = {};
        jQuery.extend(true, empty, optionsWithCustomObject);
-       same( empty.foo, optionsWithCustomObject.foo, "Custom objects copy correctly" );
+       ok( empty.foo && empty.foo.date && empty.foo.date === customObject, "Custom objects copy correctly" );
+       
+       var ret = jQuery.extend(true, { foo: 4 }, { foo: new Number(5) } );
+       ok( ret.foo == 5, "Wrapped numbers copy correctly" );
 
        var nullUndef;
        nullUndef = jQuery.extend({}, options, { xnumber2: null });