appcelerator - Titanium if attribute and Alloy.Globals not working -

according documentation possible to:

in xml markup, add if attribute element , assign property passed createcontroller() method. prefix property name $.args namespace. based on property passed method, application displays different label.

so means if put:

<label if="alloy.globals.property" color="blue">foobar</label 

wont work?? right i´m not using createcontroller method, because added on xml require tag. there way this?

as can see in docs there examples.

one of which:

<alloy>     <window>         <label if="$.args.foobar" color="blue">foobar</label>         <label if="$.args.foobaz" color="red">foobaz</label>     </window> </alloy> 

so yes, work. long property provide set when rendering. once variable changes while view open won't update it. you'll need data binding