Consider candidates revealed after one scroll step?

[frivoal]

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Migrated from WICG/spatial-navigation#56
Originally created by @hugoholgersson on Fri, 27 Apr 2018 14:26:33 GMT

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When finding the candidate set, Chrome's spatnav includes focusables that would become visible after one (document*) scroll step in the navigated direction.

* We don't do this for scrollable divs but I consider that a bug. I believe spatnav should treat both document scrolling and element scrolling in the same way.

This behavior is not spec'ed. Should we?

Downsides:

• Trickier implementation.

Upsides:

• Better UX.

1. One keystroke instead of two: [scroll + focus] instead of [scroll] + [focus].
2. Focused element (and its "focus ring", if enabled) is always visible (it cannot be scrolled out).

[jihyerish]

The issue migration script created some duplicates. #3383 is the same as this one.
So I'll close this issue.