Ext.dom.Element.setCls() function is not working. It throws the error map is undefined.



Code:



Ext.application({
    name : 'Fiddle',


    launch : function() {
        Ext.create('Ext.Component', 
        {
            html: 'Test Code'
            ,renderTo: Ext.getBody()
            ,id: 'testId'
        });
        
        var node = Ext.get(testId);
        console.log(node);
        node.setCls('testCls');
    }
});