Success Criterion 2.4.7: Focus Visible

Understanding Success Criterion: 

Any keyboard operable user interface has a mode of operation where the keyboard focus indicator is visible.

Accessibility Level: 
AA
Intent of Success Criterion: 

The purpose of this success criterion is to help a person know which element has the keyboard focus.
The purpose of this success criterion is to help a person know which element among multiple elements has the keyboard focus. If there is only one keyboard actionable control on the screen, the success criterion would be met because the visual design presents only one keyboard actionable item.
Note that a keyboard focus indicator can take different forms. One common way is a caret within the text field to indicate that the text field has the keyboard focus. Another is a visual change to a button to indicate that that button has the keyboard focus.

Specific Benefits of Success Criterion: 
  • This Success Criterion helps anyone who relies on the keyboard to operate the page, by letting them visually determine the component on which keyboard operations will interact at any point in time.
  • People with attention limitations, short term memory limitations, or limitations in executive processes benefit by being able to discover where the focus is located.