ARIA Selected and Current in a Listbox

Do screen readers reliably report the aria-selected aria-current states in a listbox with options?

Click the “Jump into list” button and use up/down arrows to move between elements. Enter will ARIA select/deselect. Spacebar will toggle aria-current="true". The first click/tap on an element will set it to be current, the second to be selected, the third sets it to both, and another will toggle off those properties.

Note: aria-current is added and removed dynamically; however, aria-selected is always present, though initially set to false. This is in order to make explicit the fact that aria-selected is implicitly false on options. We also set aria-multiselectable on the listbox.

The listbox has an aria-label in order to test if it reads reliably when the listbox gets focus.