WCAG 2.4.11
Level AA
Operable
2.4.11 Focus Not Obscured (Minimum)
The focused element is not entirely hidden by other content (sticky headers, cookie bars).
What 2.4.11 Focus Not Obscured (Minimum) means
When you Tab to a control it is at least partially visible, not hidden behind a fixed bar.
How to test
Tab through with sticky headers/footers present and confirm the focused item stays visible.
How to meet it
Add scroll-margin to focus targets; ensure sticky elements do not fully cover focused content.
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Official reference: Understanding 2.4.11 Focus Not Obscured (Minimum) (W3C)
More Operable criteria
2.1.1 Keyboard
2.1.2 No Keyboard Trap
2.1.4 Character Key Shortcuts
2.2.1 Timing Adjustable
2.2.2 Pause, Stop, Hide
2.3.1 Three Flashes or Below Threshold
2.4.1 Bypass Blocks
2.4.2 Page Titled
2.4.3 Focus Order
2.4.4 Link Purpose (In Context)
2.4.5 Multiple Ways
2.4.6 Headings and Labels
2.4.7 Focus Visible
2.5.1 Pointer Gestures
2.5.2 Pointer Cancellation
2.5.3 Label in Name
2.5.4 Motion Actuation
2.5.7 Dragging Movements
2.5.8 Target Size (Minimum)