Require js issue

resize.js

/*
* Utilies / Resize
* - - - - - - - - - - - - - -
*/

define([],function () {   
  
    var resizeItems = [],
        update = function () {
        
            App.screen.height = App.el.win.height();
            App.screen.width = App.el.win.width(); 
            
            for (i = 0; i < resizeItems.length; i++){
                var item = resizeItems[i];
                item.callback( App.screen.width , App.screen.height );
            }
        };
        
    return {
        update  : update,
        add     : function( item ) { resizeItems.push( item ); }
    }
});