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2
Votes

DropdownList accessibility - Listbox options do not use aria-selected to indicate current popup selection

Greetings,

I noticed that the DropdownList listbox popup does not use the aria-selected attribute to communicate the currently selected option in the popup.

According to the WAI-ARIA Authoring Practices Guide, "For a combobox that controls a listbox, grid, or tree popup, when a suggested value is visually indicated as the currently selected value, the option, gridcell, row, or treeitem containing that value has aria-selected set to true."

The DropdownList component is a type of combobox and is using that role. I believe the aria-selected attribute can be argued to be necessary to communicate the state of the combobox component, and therefore missing it would be an accessibility issue under the WCAG 4.1.2 criterion.

Setting aria-selected="true" for the currently selected listbox option should resolve the issue.

I tested by using your Default Functionalities demo and looking at the listbox options while using it. I have attached a screenshot below.

If you need more information, please let me know. Thank you!

Ken Watson

DropdownList_ListboxOption.PNG