The spec already references section 2.1 "Make all functionality available from a keyboard." of the WCAG 2.0 Guidelines but #2407 and its subtickets (e.g. #2411 which is the only ticket that's still open), we specified more than keyboard accessibility.
I do see a few options on how we could tackle those:
- Refer to WAI-ARIA instead or in addition to WCAG 2.0
- Include more sections from WCAG 2.0 (e.g. section 2.4 "Provide ways to help users navigate, find content, and determine where they are.")
- A combination of the above two
- Don't expand the scope beyond keyboard-accessibility