interface MenuKeyboardEvent {
    key: string;
    currentTarget: EventTarget | null;
    preventDefault: () => void;
    stopPropagation: () => void;
}
export declare const handleMenuItemKeydown: (event: MenuKeyboardEvent, activate: () => void) => void;
/**
 * The first menu item directly inside `list`. Nested submenu lists and group lists own
 * their items, so they are skipped. Unlike sibling navigation this does not require a
 * laid-out box, because it runs right after the list has just been opened.
 */
export declare const firstMenuItemOf: (list: HTMLElement | null) => HTMLElement | null;
/**
 * Expands a submenu with the arrow that belongs to the orientation of the list holding it
 * (ArrowDown inside a horizontal menubar, ArrowRight inside a vertical/inline menu), and
 * with Enter/Space while it is still closed. Returns `true` when the event was consumed.
 */
export declare const handleSubMenuTitleKeydown: (event: MenuKeyboardEvent, state: {
    isMenubarItem: boolean;
    opened: boolean;
}, actions: {
    expandAndFocusFirst: () => void;
}) => boolean;
/**
 * Escape inside an open submenu closes just that level and hands focus back to its
 * trigger, so nested levels unwind one step at a time.
 */
export declare const handleSubMenuListKeydown: (event: MenuKeyboardEvent, closeAndRefocusTrigger: () => void) => boolean;
export {};