Track scrubber missing aria-valuenow attribute

[elynema]

Description

The SiteImprove accessibility checker browser plugin is indicating that there is an element with role="slider" that is missing the aria-valuenow attribute on the media object page. Looking at where that role occurs in the code, I believe that is in the Track scrubber. It does not appear to have an aria-valuenow attribute even when expanded.

I'm not seeing this issue show up in the SiteImprove site scanner or in WAVE, so it could be a false positive?

Done Looks Like

• Evaluate whether this is someone requiring a change or fix
• The missing value does appear in other places in Avalon; we can look to that for other examples