export declare const DEFAULT_VIEWPORT_GAP = 10;
declare type StartExpandingMenuOnScrollOptions = {
    menuWrapper: HTMLDivElement | null;
    menu: HTMLDivElement | null;
    menuScrollPane: HTMLDivElement | null;
    menuItemsWrapper: HTMLDivElement | null;
    viewportGap: number;
};
/**
 * Sets up a scroll listener to expand the menu on scroll.
 *
 * This behaviour happens when the menu is not using its maximum height
 * because of initially prioritizing:
 * - better placement (below a button for a menu button)
 * - better alignment (for a custom select menu)
 */
export declare function startExpandingMenuOnScroll({ menuWrapper, menu, menuScrollPane, menuItemsWrapper, viewportGap, }: StartExpandingMenuOnScrollOptions): () => void;
declare type ScrollMenuItemIntoViewOptions = {
    menuItem: HTMLDivElement | null;
    menu: HTMLDivElement | null;
    menuScrollPane: HTMLDivElement | null;
    scrollIndicator: HTMLDivElement | null;
};
export declare function scrollMenuItemIntoView({ menuItem, menu, menuScrollPane, scrollIndicator, }: ScrollMenuItemIntoViewOptions): void;
export {};