review.state.highlighted.done

Further tabIndex getter tweaks

[OK] These default values seem reasonable (noted that, at least currently, SVG elements only get a default tabIndex of 0 if they've an href, which matches HTML). SVG links still need correctly labelling, as would objects.

Make the default tabIndex for <frame> 0

[OK]

Make autofocus="" a global attribute

[OK] Normal accessibility considerations apply - this only widens the scope of the attribute as opposed to changing behaviour. Note: Firefox does not support it, and Chrome/Edge only apply it to focusable elements, as per the referenced TPAC consensus and that seems most sensible.

Update autofocus processing algorithm

[OK] Could check with devs?

Update sequential focus navigation to include shadow trees

[OK] This and related commits (below) implemented the feature as specced by W3C, though there were some concerns within W3C, e.g.: https://github.com/w3c/webcomponents/issues/554 - ultimately however the issue was closed with the status quo.

Define different types of focusability

[OK] This both reflects real-world behaviour and clarifies it.

Handle delegates focus in the focusing steps

[OK] Relates to d19d9632

Tweak shadow host focus delegation

[OK] Relates to d19d9632

Prevent double-focusing with autofocus="" inside <dialog>

[OK]

Make autofocus="" work with delegatesFocus and <area>

[OK] Supported in Chrome/Edge; not Firefox

Add Accessibility considerations to element definitions

[OK] Most helpful :-)

Add "Accessibility considerations" for custom elements

[OK] Most helpful :-)