import type { Dispatch, SetStateAction } from 'react';
export declare const inMemoryData: Map<string, unknown>;
export type SessionStorageOptions<T> = {
    defaultValue?: T | (() => T);
    storageSync?: boolean;
    serializer?: {
        stringify: (value: unknown) => string;
        parse: (value: string) => unknown;
    };
};
export type SessionStorageState<T> = [
    T,
    Dispatch<SetStateAction<T>>,
    {
        isPersistent: boolean;
        removeItem: () => void;
    }
];
export default function useSessionStorageState(key: string, options?: SessionStorageOptions<undefined>): SessionStorageState<unknown>;
export default function useSessionStorageState<T>(key: string, options?: Omit<SessionStorageOptions<T | undefined>, 'defaultValue'>): SessionStorageState<T | undefined>;
export default function useSessionStorageState<T>(key: string, options?: SessionStorageOptions<T>): SessionStorageState<T>;