import { NavigationDirection } from './entryState.js';

/**
 * Read the value this app left on the current history entry, and queue the value to
 * leave on the entry the next navigation departs from.
 *
 * `value` is `undefined` on an ordinary forward navigation — there is no bookmark for
 * a page being visited for the first time — and on a traversal to an entry that was
 * stamped by nothing (a navigation the app did not initiate).
 *
 * `save` queues; it does not send. The queued value travels with the next
 * `navigate()`, which is the only moment the app knows an entry is being left.
 */
declare const useEntryState: <T>(key: string) => {
    value: T | undefined;
    save: (value: T) => void;
};
/**
 * How the browser reached the page being rendered: `push` for an ordinary
 * navigation, `back`/`forward` for a history traversal.
 *
 * An app that resets its own view on arrival — scrolling a container to the top is
 * the usual one — should stand down on a traversal, so a restored position is not
 * immediately thrown away.
 */
declare const useNavigationDirection: () => NavigationDirection;

export { useEntryState, useNavigationDirection };