If you file a bug please include a simple repro case. In general this seems
to be working fine (and is used withing google). So there must be something
specific about our particular case.

On Wed, Sep 21, 2016 at 9:43 AM Thomas Broyer <t.bro...@gmail.com> wrote:

> It should be possible, from spec:
> https://docs.google.com/document/d/10fmlEYIHcyead_4R1S5wKGs1t2I7Fnp_PaNaa7XTEk0/edit#heading=h.aaedpeo8ehl8
>
> Can you file a bug in the issue tracker?
> https://github.com/gwtproject/gwt/issues
>
>
> On Wednesday, September 21, 2016 at 9:38:16 AM UTC+2, Nándor Előd Fekete
> wrote:
>
> Hi everyone!
>
> Are we supposed to be able to extend native (browser) JsTypes from Java?
> Specifically, having the following declaration (from Elemental2):
>
> @JsType(isNative = true, namespace = JsPackage.GLOBAL)
> public class HTMLDivElement extends HTMLElement {...}
>
> and the extending type
>
> public class DummyElement extends HTMLDivElement {...}
>
> I'm getting TypeError: Illegal invocation from the compiled js code when
> it tries to define the class (com.google.gwt.lang.Runtime.copyObjectProperties
> (Runtime.java:104)), while copying native properties from the extends js
> type's prototype. The property in this case is 'align' but it happens on
> other browser native properties too.
>
> Thanks for the help!
>
> All the best,
> Nandi.
>
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