Storage.setItem()

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.

Inputs: keyName A string containing the name of the key you want to create/update. keyValue A string containing the value you want to give the key you are creating/updating.

Exceptions: QuotaExceededError Thrown if the storage run out of disk quota or the user declined to grant you more space.