WCAG 2.4.12: Focus Not Obscured (Enhanced)
WCAG 2.4.12 Focus Not Obscured (Enhanced) is a level AAA success criterion from WCAG 2.2. No part of the focused item is hidden by author-created content.
Even a partly covered focus ring is hard to see.
How to test
The whole control, including its outline, should be visible when focused.
How to fix
Increase the scroll offset and move sticky UI away from focused items.
Example that fails
The bottom of a focused button sits under a sticky chat.
Example that passes the check
The whole button and its outline are visible.
Shopify
Raise scroll-padding and move chat apps so they do not cover focused controls.
WooCommerce
Move sticky add-to-cart so it does not cover the next field.
WordPress
Keep sticky bars short and offset scroll.
Wix
Resize the sticky banner so focused buttons clear it.