import type { RefObject } from "react";
import type { MenuPlacement } from "./Menu.js";
interface Options {
    popoverRef: RefObject<HTMLDivElement | null>;
    triggerRef: RefObject<HTMLDivElement | null>;
    open: boolean;
    placement: MenuPlacement;
    anchorName: string;
}
/** Placement for Menu (D53). Above the anchor floor this hook only declares
 * anchor-name / position-anchor and lets CSS position the popover. Below it,
 * a top-layer element's containing block is the viewport — there is no
 * declarative way to place it near its trigger — so this sets `inset` from
 * the trigger rect and keeps it current. That branch is dead code above the
 * anchor floor and is deletable outright once the floor rises. */
export declare function useMenuPlacement({ popoverRef, triggerRef, open, placement, anchorName }: Options): void;
export {};
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