Keith Cirkel

> I think I'd prefer breaking apart features of these builtin elements and adding each capability to `ElementInternals`. That'll allow a custom element to combine a set of features even...

Thank you @LeaVerou for commenting on this, you managed to articulate what I failed to at (several) TPACs and in https://github.com/whatwg/html/issues/11061#issuecomment-2673966134. I'm hesitant about the proposed solution because it feels...

Discussed this with fellow Mozillians and we have some comments: - It may be tricky to correctly serialize the data coming out of a form especially as the form changes...

I'd be curious about the use cases here. How common does this occur in practice? How does a website go about validating what can be wildly different inputs (I assume...

Could you explain more about what you intend to extend? Is the proposal to allow custom elements to have the `popovertarget` or `commandfor` attributes? Or is it to extend the...

I agree.

@scottaohara I believe I've addressed your review commentary. If you would kindly give it another pass that would be much appreciated.

Thanks @scottaohara! I'll merge and get to work on the AAM PRs!

Sounds reasonable to me (non-implementer, userland consumer). They already throw for a handful of exceptional cases (calling `showModal()` twice for example) which are much more likely to occur.

Sounds a bit like slots: ```html The rest of my web page goes here new content gets streamed out-of-order! ```