The attribute aria-expanded is not supported by the role menuitem.

[jlurena]

A menu item, acting as a submenu given a role of menuitem should have an aria-expanded attribute. I am being thrown an error when I do this.

Something like this raises an error:

<ul role="menubar">
  <li>
    <a role="menuitem" aria-expanded="false" href="someurl.com">Some URL</a>
      <ul role="menu">
        <li><a href="https://google.com">Google.com</a></li>
        <li><a href="https://github.com">Github.com</a></li>
      </ul>
  </li>
</ul>

The attribute aria-expanded is not supported by the role menuitem.

According to w3c/aria#454 this is valid aria spec.

This is also shown on an example on W2
https://www.w3.org/TR/wai-aria-practices/examples/menubar/menubar-1/menubar-1.html

[Semigradsky]

Any progress here?

[jessebeach]

This error does not occur in v6.3.x.