ARIA 1.1 deprecated aria-grabbed and aria-dropeffect. While no feature yet exists to replace these attributes, their current support is not particularly great, and since they are deprecated, it is highly unlikely their support will improve.

ARIA in HTML is being updated to call out that authors should not rely on these features, and request that conformance checkers warn authors about the attributes' deprecated status.

aria-grabbed and aria-dropeffect test case