Made isObjectLiteral to work correctly with custom objects with empty prototypes.

[jquery.git] / src / core.js

diff --git a/src/core.js b/src/core.js
index 611e536..1d5a25b 100644 (file)
--- a/src/core.js
+++ b/src/core.js
@@ -328,13 +328,20 @@ jQuery.extend({
                        return false;
                }
                
+               // not own constructor property must be Object
+               if ( obj.constructor
+                 && !hasOwnProperty.call(obj, "constructor")
+                 && !hasOwnProperty.call(obj.constructor.prototype, "isPrototypeOf") ) {
+                       return false;
+               }
+               
                //own properties are iterated firstly,
                //so to speed up, we can test last one if it is own or not
-               
+       
                var key;
                for ( key in obj ) {}
                
-               return !key || hasOwnProperty.call( obj, key );
+               return key === undefined || hasOwnProperty.call( obj, key );
        },
 
        isEmptyObject: function( obj ) {