Can Accessor not be used as Singleton?

Question

I'm playing around with Accessor and trying to return a Singleton but requiring the module anytime after first require on booting the app just returns an Object. // returns Singleton define([ 'dojo/_base/declare', 'dojo/Stateful', 'dojo/Evented' ], function ( declare, Stateful, Evented ) { var _instance = null; var Model = declare([Stateful, Evented], { // stuff }); if (!_instance) { _instance = new Model(); } return _instance; }); // returns Object define([ 'esri/core/Accessor', 'dojo/Evented' ], function ( Accessor, Evented ) { var _instance = null; var Model = Accessor.createSubclass([Evented], { // stuff }); if (!_instance) { _instance = new Model(); } return _instance; });‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍

deleted-user-iPdcWUgWcsoy · Accepted Answer

Perhaps you find further informations in this link for real singletons (entry by "JonS"). We use it in our applications. http://stackoverflow.com/questions/4334437/dojo-singleton-or-at-least-static-method-variable Your second sample code can look like this. // returns Object define([ 'esri/core/Accessor', './Singleton', 'dojo/Evented' ], function ( Accessor, Evented ) { var Model = Singleton(Accessor.createSubclass([Evented], { // stuff })); return Model.getInstance(); // or just return the singleton });‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍