Re: Focus-appearance & decorative effects

Hey Alastair,
I'm not a fan of creating a normative definition for something that's not
used in normative text. Explaining inline would be better I think.

Would something like this work:

What is perceived as the user interface component or sub-component (to
determine enclosure or size) depends on its visual presentation. The visual
presentation includes the component's visible content, border, and
component-specific background. It does not include shadow and glow effects
outside the border, background, and content of the component.


The key difference is that we explicitly only exempt shadows and glows
outside the border-box. I can't think of anything else we'd want exempt, so
perhaps we can be more constrained?



On Tue, Aug 23, 2022 at 8:53 PM Alastair Campbell <acampbell@nomensa.com>
wrote:

> Hi folks,
>
>
>
> During the meeting we discussed adjusting the perception interpretation
> paragraph to ignore ‘extraneous’ effects like shadow/glow.
>
>
>
> I’ve done a bit of checking in WCAG 2.1 for current definition, and tried
> to implement Gregg’s suggestion here:
>
> https://github.com/w3c/wcag/pull/2632/files
>
>
>
> That updates the note to:
>
> “What is perceived as the user interface component or sub-component (to
> determine enclosure or size) depends on its visual presentation. The visual
> presentation includes the component's visible content, border, and
> component-specific background. It does not include <a>*decorative effects*</a>
> emanating from the visible component such as shadows or glow effects.”
>
>
>
> The definition is then:
>
> <p>effects added to an element that are outside of the element and if
> removed do not change the ability to identify the element</p>
>
> <p class="example">Shadows or glow effects around a user interface
> control.</p>
>
>
>
> The question that occurs to me is: Why isn’t a background/border a
> decorative effect?
>
> I think the answer is: The border helps you identify the UIC, whereas a
> shadow doesn’t. Maybe?
>
>
>
> I’d appreciate any comments/suggestions as soon as possible please, we’re
> almost at the (this) finish line…
>
>
>
> -Alastair
>


-- 
*Wilco Fiers*
Axe-core & Axe-linter product owner - WCAG 3 Project Manager - Facilitator
ACT Task Force