Default accessibility semantics for custom elements

[rakina]

こんにちはTAG!

I'm requesting a TAG review of:

• Name: Default accessibility semantics for custom elements
• Specification URL: Allow setting default accessibility semantics for custom elements whatwg/html#4658, Generalize AccessibilityRole/AriaAttributes IDL w3c/aria#984
• Explainer (containing user needs and example code)¹: https://github.com/alice/aom/blob/gh-pages/explainer.md#default-semantics-for-custom-elements-via-the-elementinternals-object
• Tests: none yet
• Primary contacts (and their relationship to the specification): @alice @domenic @tkent-google @rakina

We'd prefer the TAG provide feedback as (please select one):

• open issues in our GitHub repo for each point of feedback
• open a single issue in our GitHub repo for the entire review
• leave review feedback as a comment in this issue and @-notify one of the primary contacts above

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¹ For background, see our explanation of how to write a good explainer.

[slightlyoff]

Just wanted to flag that Blink is likely to ship this, in part, because this review was opened in August but hasn't seen forward movement since then. Speak now or hold your peace!

[alice]

(Also note that this was touched on in the previous review of AOM.)

[torgo]

Discussed briefly on our call today and the consensus was to close with positive feedback.