Vanilla Element Scanner does not detect elements registered via document.registerElement

[MaKleSoft]

Even though document.registerElement is deprecated, there are still some libraries that are using it (e.g. this one: https://github.com/github/time-elements) so I think it would be worthwhile to add support for it.

[MaKleSoft]

Huh, looking at the code it seems like another restriction of the current scanner is that elements need to be implemented via es6 class expressions to be detected. Thats probably something else that should be improved on.

[rictic]

Yeah, v0 element declarations are more likely to have more varied declaration syntax, but even trickier is getting any attribute information. The v1 observedAttributes property gives us a really useful hook for extracting the API of a custom element. For v0 elements I think we'd just have to rely on jsdoc comments.

[rictic]

We would accept a PR to add this though.

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.