interface StorageAdapter { getItem(key: string): Promise<null | string>; setItem(key: string, value: string): Promise<void>; removeItem(key: string): Promise<void>;} Methods
getItem
getItem(key: string): Promise<null | string> Returns Promise<null | string>
setItem
setItem(key: string, value: string): Promise<void>
removeItem
removeItem(key: string): Promise<void>
异步键值存储适配器。