/**
 * @file
 * @author Auth0 https://github.com/auth0/auth0.js
 * @license MIT
 */
import { type StorageHandlerOptions, type StorageBackend } from '../../types/storage';
/**
 * Manages the underlying storage. Defaults to CookieStorage; uses localStorage when
 * force_local_storage is set. Failover chain: localStorage → CookieStorage → DummyStorage.
 */
export default class StorageHandler {
    storage: StorageBackend;
    constructor(options: StorageHandlerOptions);
    failover(): void;
    getItem(key: string): string | null | undefined;
    removeItem(key: string): void;
    setItem(key: string, value: string, options?: Cookies.CookieAttributes): void;
}