jquery selector: reverting [5343], check #1960.

[jquery.git] / src / core.js

diff --git a/src/core.js b/src/core.js
index 80115b4..f6f0bd5 100644 (file)
--- a/src/core.js
+++ b/src/core.js
@@ -465,13 +465,13 @@ jQuery.fn = jQuery.prototype = {
                var parts = key.split(".");
                parts[1] = parts[1] ? "." + parts[1] : "";
 
-               if ( value == null ) {
+               if ( value === undefined ) {
                        var data = this.triggerHandler("getData" + parts[1] + "!", [parts[0]]);
                        
-                       if ( data == undefined && this.length )
+                       if ( data === undefined && this.length )
                                data = jQuery.data( this[0], key );
 
-                       return data == null && parts[1] ?
+                       return data === undefined && parts[1] ?
                                this.data( parts[0] ) :
                                data;
                } else
@@ -587,7 +587,7 @@ jQuery.extend = jQuery.fn.extend = function() {
                                        target[ name ] = jQuery.extend( deep, src, copy );
 
                                // Don't bring in undefined values
-                               else if ( copy != undefined )
+                               else if ( copy !== undefined )
                                        target[ name ] = copy;
 
                        }
@@ -669,7 +669,7 @@ jQuery.extend({
                        jQuery.cache[ id ] = {};
                
                // Prevent overriding the named cache with undefined values
-               if ( data != undefined )
+               if ( data !== undefined )
                        jQuery.cache[ id ][ name ] = data;
                
                // Return the named cache data, or the ID for the element