Update ARIA IDL to define AccessibilityRole and AriaAttributes instead of ARIAMixin

[mrego]

ARIA IDL only defines ARIAMixin interface: https://w3c.github.io/aria/#idl-interface

While AOM has 2 interfaces AccessibilityRole and AriaAttributes: https://wicg.github.io/aom/spec/aria-reflection.html#idl-interface

Both Chromium and WebKit implementations match AOM regarding this:

• Chromium: accessibility_role.idl & aria_attributes.idl
• WebKit: AccessibilityRole.idl & AriaAttributes.idl

Should ARIA spec get updated?

[jnurthen]

@cookiecrook can you please let us know what to do with this

[cookiecrook]

IIRC, I had originally proposed them separated (role has a broader applicability than the ARIA attrs) but combining the interfaces in ARIA may have been @domenic's suggestion sometime after the AOM proposal made it into the ARIA issue tracker. Practically speaking, it's not important to separate since implementations would likely want both.

Unless @domenic has a reason, I think it makes sense to update the ARIA spec to match the implementations.

[domenic]

It's important to merge them for HTML's features which treat them the same, namely ElementInternals.

It is unobservable whether they are a single mixin or two, so implementations don't have much weight here IMO. They can change to update the spec or not, or they could split it into 5 different mixins. It's an implementation choice and not relevant to specs.

[cookiecrook]

I think this can be closed then. The original hand-off proposal from AOM to ARIA WG is no longer relevant IMO, but we could clean it up and have the AOM explainer just reference the new portion of the ARIA spec. What do you think @mrego?

[mrego]

I think this can be closed then. The original hand-off proposal from AOM to ARIA WG is no longer relevant IMO, but we could clean it up and have the AOM explainer just reference the new portion of the ARIA spec. What do you think @mrego?

Sounds good, thanks. I wasn't sure this was relevant or not, but I saw some inconsistency, thanks for the clarifications.

[mrego]

Ok, I've reported WICG/aom#194 to track the work on the AOM repo. Closing this for now.

Thanks for the feedback.