The length read-only property of the Storage object.
The clear() method of the Storage interface clears all keys stored in a given Storage object.
The getItem() method of the Storage interface, when passed a key name, will return that key's value, or null if the key does not exist, in the given Storage object.
The key() method of the Storage interface, when passed a number n, returns the name of the nth key in a given Storage object.
The removeItem() method of the Storage interface, when passed a key name, will remove that key from the given Storage object if it exists.
The setItem() method of the Storage interface, when passed a key name and value, will add that key to the given Storage object, or update that key's value if it already exists.
In-memory localStorage drop-in replacement.