VirtualList doesn't provide any semantics

[rolfsmeds]

What is the problem?

vaadin-virtual-list doesn't provide any default semantics, nor an API for providing custom semantics, e.g. in the form of ARIA roles.

As the component is essentially a list, the root element should probably have either role="list" or role="listbox", depending on whether items can be selected, and the items (currently plain <div>s) should have role="listitem" or "role="option" depending on the root element's role. In the case of selectable items, there should also be a way to mark the selected item with aria-selected.

As this is a highly generic component, equally valid for selectable and non-selectable items, both semantics should probably be possible, so an API for setting selectability may be required.

Browsers

• Chrome
• Firefox
• Safari
• Safari on iOS
• Edge

Screen Readers

• None
• NVDA
• JAWS
• VoiceOver on MacOS
• VoiceOver on iOS

[yuriy-fix]

Related AC: vaadin/platform#6838