revise custom element guidance

w3c / html-aria

ARIA in HTML

https://w3c.github.io/html-aria/

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revise custom element guidance #290

Closed scottaohara closed 3 years ago

scottaohara commented 3 years ago

if defining roles via elementInternals, then authors should not overwrite those roles with the role attribute.

if no role was defined via elementInternals, then any role can be valid for a custom element, but a form associated custom element should only allow form-related roles.

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scottaohara commented 3 years ago

hmm, weird how that happened. updated