Where hover or keyboard focus makes additional content appear and disappear: it can be dismissed without moving hover or focus (unless it reports an input error or covers nothing), the pointer can move onto it without it vanishing, and it stays visible until the trigger is removed, the user dismisses it or it becomes invalid. Browser-controlled presentation such as native title tooltips is exempt.
This control maps to 3 controls across 1 other frameworks. If you already hold one of them, the evidence you collected for it is the starting point here rather than new work.
Every mapping shown was judged rather than inferred from wording similarity, and the ones that failed review are published too. See the coverage reports and what was rejected.
The graph holds this control, the 3 it maps to, and the evidence behind each claim, over MCP and REST.