What this means
People must be able to reach and use controls with a keyboard. The focused control needs a visible marker. Focus is the link, button, or field ready to respond to a key press.
Passing examples
- Tab reaches a download link with a visible outline, and Enter opens it.
- A button can be reached and activated with the keyboard.
- A popup opens and closes with the keyboard, and focus returns to a sensible place.
Failing examples
- A button works only when clicked with a mouse and is skipped by Tab.
- Tab reaches a link, but there is no visible indication of the focused link.
- A popup traps keyboard focus with no way to close or leave it.