UnreviewedUnreviewedisIs any a-menu open?
Optionaldoc: DocumentUnreviewedcontainsIs node inside the open menu system — a menu surface, a slotted item, or
an open trigger? (A tooltip there is a menu-item tooltip and still shows,
above the menu.)
Menu ↔ Tooltip presence coordinator — in-memory only, no DOM.
a-menupublishes whether a menu system is open and whether a node sits inside it;a-tooltipreads this to suppress a tooltip anchored outside an open menu. (Menu and tooltip are both top-layer popovers, stacked by show order, so a tooltip opened while a menu is up would paint over it — z-index can't reorder the top layer.) Decoupled on purpose: neither element imports the other, and ifa-menunever loads there are no providers and tooltips remain available.