Focus visible enhanced update

Hi everyone,

There were a few questions about the update to the AAA version we surveyed here:
https://www.w3.org/2002/09/wbs/35422/wcag22-focus-appearance-enhanced/results#xq1

I just wanted to do a quick line-by-line on the changes/alignment, comparing the min to enhanced version.

Most of the mis-alignment is in the size bullet, there is a second option there if people prefer that.


1st line:
Min: "When user interface components receive keyboard focus, all of the following are true:"
Enh: "When user interface components have keyboard focus, all of the following are true:"

Differences: received to "have", making it a higher requirement.


Min area bullet:
Min: The focus indicator area is either:

  *   at least as large as the area of a 1 CSS pixel thick perimeter of the unfocused component;
  *   at least as large as a 4 CSS pixels border along the shortest side of the unfocused component, and no thinner than 2 CSS pixels.
Enh: "The focus indicator area is greater than or equal to a 2 CSS pixel solid border around the component."

Differences:

  *   Removed the second sub-bullet, raising the requirement.
  *   Left the "is greater than or equal to" as it was, thinking that the requirement is more blunt, so it was ok.
  *   Left "solid", just for emphasis.
  *   Left "border around" as with a width of 2px, you don't have the same math issues.

If people would prefer more alignment, then I'd suggest:
"The focus indicator area is at least as large as the area of a 2 CSS pixel thick perimeter of the unfocused component;"

However, the question is then: Does a 2px perimeter mean inside the element or outside? (Because you can't fit 2px on the perimeter.)


Change of contrast bullet:
Min: "The pixels making up the minimum focus indicator area achieve at least a 3:1 contrast ratio between their colors in the focused and unfocused states."
Enh: "The pixels making up the minimum focus indicator area achieve at least a 4.5:1 contrast ratio between their colors in the focused and unfocused states."

Differences: Just the contrast level number.


Adjacent contrast bullet:
This is not included in the AAA version, as the AA version is "The pixels in the minimum focus indicator area achieve at least a 3:1 against adjacent colors in the focused component or the minimum focus indicator area has a thickness of at least 2 CSS pixels."

The 2px thickness is met so the bullet is not needed.


Not obscured bullet:
Min: "The item with focus is not entirely hidden by author-created content."
Enh: "No part of the focus indicator is hidden by author-created content."

Differences: increased the requirement to 'no part' and making the target the 'focus indicator' rather than the element.


Kind regards,

-Alastair

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@alastc / www.nomensa.com<http://www.nomensa.com>