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Keyboard trap

A part of a page that keyboard focus can enter but not leave, so someone using a keyboard is stuck.

Also called
keyboard traps

A keyboard trap is a part of a page that focus can enter but cannot leave using a keyboard. For example, a person reaches an embedded player but cannot move back to the surrounding page.

WCAG's No Keyboard Trap requirement is Level A. A modal dialog can keep focus inside while it is open if there is an accessible way to dismiss it. Escape is a common method; the requirement allows other keyboard methods, with instructions when needed. After closing a dialog, focus needs to return to a logical place, usually the control that opened it.

Source

Understanding No Keyboard Trap

World Wide Web Consortium (W3C). Checked .

Keyboard navigation
Moving through and operating a page with the keyboard alone, mostly with Tab, Enter, Space, and the arrow keys.
Focus indicator
The visible outline or highlight that shows which element the keyboard is on.

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