export declare type Focus = "first" | "last" | string;
/**
 * A function that is used to focus an element within the provided node.  This
 * can either focus the first, last, or a querySelector found element.
 *
 * @param container Either an HTMLElement or the document to focus an element
 * within.
 * @param focus Either the "first" or "last" string to focus the first or last
 * focusable element within the container or a query selector string to find a
 * focusable element within the container.
 * @param preventScroll Boolean if the focus event should not scroll the element
 * into view. This should normally remain `false`, but can be useful if the
 * element gets focused while offscreen during a transition.
 * @param progamatic Boolean if programatically focusable elements should be
 * included as well.
 */
export default function focusElementWithin(container: HTMLElement | Document, focus: Focus, programatic?: boolean, preventScroll?: boolean, elements?: HTMLElement[]): void;