find invalid element in iron form

[dric...@gmail.com]

Hey

does anybody know how to find any or better the first invalid element of an iron form.

The elements are in templates added. I was not able to find my input elements.

I tried: Polymer.dom(this.$.form1.childNodes[1]).getEffectiveChildNodes()

but the input elements are in a deep structure.

Is there a way to get a list of the validated input elements or the invalid input elements in the iron form or the form?

Thanks

Kind regards

Dirk