Storage interface of the Web Storage API provides access to a particular domain's session or local storage. It allows, for example, the addition, modification, or deletion of stored data items.Window.sessionStorage is made; whereas for local storage the call is made to Window.localStorage.Returns an integer representing the number of data items stored in the Storage object.
Promise<number>When invoked, will empty all keys out of the storage.
Promise<undefined>When passed a key name, will return that key's value.
string. A string containing the name of the key you want to retrieve the value of.Promise<string>When passed a number n, this method will return the name of the nth key in the storage.
number. An integer representing the number of the key you want to get the name of. This is a zero-based index.Promise<string>When passed a key name, will remove that key from the storage.
string. A string containing the name of the key you want to remove.Promise<undefined>When passed a key name and value, will add that key to the storage, or update that key's value if it already exists.
string. A string containing the name of the key you want to create/update.string. A string containing the value you want to give the key you are creating/updating.Promise<undefined>