Virtualize component spacers are not accessible #62989
Description
Is there an existing issue for this?
- I have searched the existing issues
Describe the bug
CTI noticed a bug in the Aspire dashboard with row counts - dotnet/aspire#10123
The root cause of this issue is that spacers created in the Virtualize component do not have aria-hidden added to them. This should be done, as these elements are not focusable but also should not be visible to screen readers. Though this does not just affect tables, a tbody with a spacer tr element (as suggested by the SpacerElement documentation, 'when rendering inside a "tbody", consider setting to the value "tr"') will have its row count off by up to 2.
Expected Behavior
All spacers should include the attribute aria-hidden="true".
Steps To Reproduce
Repro steps in dotnet/aspire#10123, but you could also render any Virtualize with spacer elements of li inside ul/ol, or a Virtualize with spacer elements of tr inside a tbody/theader
Exceptions (if any)
No response
.NET Version
No response
Anything else?
No response