declare const canUseDom: () => boolean;
declare const normalizeUserId: (value: string | null | undefined) => string | null;
declare const buildUserIdStorageKey: (funnelId?: string | null) => string;
declare const generateUserId: () => string;
declare const readStoredUserId: (funnelId?: string | null) => string | null;
declare const persistUserId: (value: string, funnelId?: string | null) => string;
declare const getOrCreateUserId: (funnelId?: string | null) => string;
export { buildUserIdStorageKey, canUseDom, generateUserId, getOrCreateUserId, normalizeUserId, persistUserId, readStoredUserId, };