add arianotify draft

[keithamus]

This adds some mechanics for introducing the ariaNotify API on Elements, which is a function that will map to various AT APIs, as defined in core-aam w3c/core-aam#232

Test, Documentation and Implementation tracking

Once this PR has been reviewed and has consensus from the working group, tests should be written and issues should be opened on browsers. Add N/A and check when not applicable.

• "author MUST" tests:
• "user agent MUST" tests:
• Browser implementations (link to issue or commit):
  • WebKit:
  • Gecko:
  • Blink:
• Does this need AT implementations?
• Related APG Issue/PR:
• MDN Issue/PR:

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Preview | Diff

[pkra]

@keithamus I've rebased on main (after the monorepo merge added core-aam). Then I transferred the commit from w3c/core-aam#232 over to this branch.

Could you please double check?

[keithamus]

Looks correct to me, thanks @pkra!