Level A
If keyboard focus can be moved to a component of the page using a keyboard interface, then focus can be moved away from that component using only a keyboard interface, and, if it requires more than unmodified arrow or tab keys or other standard exit methods, the user is advised of the method for moving focus away.>
Explanation
It must be possible for someone to navigate through content using a keyboard, without getting stuck at any point. This makes sure that people who cannot use a mouse do not become trapped.
Responsibilities
- Design
- Development
- QA
Requirements
- It is possible to use the tab key to move focus away from any element that receives keyboard focus.
Common mistakes
- A dialogue opens but cannot be dismissed without a mouse, so keyboard users are unable to access the content beneath it;
- Content is presented in an infinite scroll, so a keyboard user has to tab through all the content inside the scroll before exiting it;
- As a user tabs away from a form field, focus is automatically returned to the field because it contains errors.