type DefaultVal<T> = T extends Record<string, any> ? Partial<T> : T;
export declare function createStorage<T = any>(key: string): StorageInstance<T>;
export interface StorageInstance<T = any> {
    setItem(val: T): T;
    getItem(): T | undefined;
    getItem(defaultVal: DefaultVal<T>): T;
    removeItem(): void;
    updateItem(val: DefaultVal<T>): T;
}
export {};