support parser's auto-require with _WidgetsInTemplateMixin

[gorgoroth]

I have created a custom dialog widget based on the dijit/Dialog. This custom widget uses a html template, loaded with dojo/text!, which is assigned to the content member of the widget. The html template contains a declarative widget (dijit/Button). Inside my widget class, at startup(), there are some dom queries to search for some dom nodes. When the dijit/Button dom node is found and I search for the relative button widget with registry.byId( node.id ), it seems the button widget is not instantiated yet so my code fails. Using firebug, I have noticed that when mywidget.startup() is invoked, the parser has not yet finished to download dijit/Button Button.html template, so it seems that the parser has not yet finished his work on my widget template.

Is there a way to wait for the parser when my widget is instantiated with new, before i can safely call startup()?

As a workaround, now I have explicitly requested 'dijit/form/Button' from my widget define() to be sure that button.html is downloaded before my widget will be used. But I hope there is a better solution.

[bill]

Auto-require is not supported with templates. This is a known and expected limitation (rather than a bug). Might be able to fix it along with #13782 though.

[bill]

Closing this as wontfix since auto-require itself is inconsistent with how custom elements work, and thus we aren't supporting it in ​https://github.com/ibm-js/delite.