12.11 On each web page, is the additional content that appears when hovering, focusing or activating a user interface component accessible by keyboard if necessary?

Test 1 (12.11.1)

1. Find in the document all the additional content that appears when hovering, focusing or activating a user interface component.
2. For each additional content item, if it contains user interface components that the user can interact with using the keyboard (for example, a customised tooltip with a link in its content), check that these user interface components can be reached using the keyboard.
3. If this is the case for each additional content item, the test is validated.