Closed
Description
When an overlay opens, the browser focus should be thrown into it. This means either the overlay itself or the first focusable item in the overlay should receive focus immediately by default. When this occurs the focus should flow through the overlay, and then be thrown back to the triggering element when focusable content has been fully stepped through. For instance, the sp-dropdown element should not need to throw focus into its options list when it opens, and once the list is exhausted (a single tab in this case for the floating tab index) the focus should return to the UI from which it came.
related #709