WCAG success criterion: "All non-text content that is presented to the user have a text alternative that serves an equivalent purpose"

BITV test step: Graphical control elements have useful alternative texts.

Graphical control elements cannot be perceived by blind users. A meaningful alternative text should be provided for them.

The graphical control marked in red has an alternative text, but it is hidden from screen readers by means of the aria-hidden="true" attribute. All elements that can be accessed via the keyboard should have alternative text, even if the functionality seems unnecessary for blind users.

Occurs in several places.