AsyncStorage is a simple, asynchronous, persistent, key-value storage system
that is global to the domain. It's a facade over, and should be used instead of
window.localStorage to provide an asynchronous API and multi functions. Each
method returns a Promise object.
It is recommended that you use an abstraction on top of AsyncStorage instead
of AsyncStorage directly for anything more than light usage since it operates
globally.
The batched functions are useful for executing a lot of operations at once, allowing for optimizations to provide the convenience of a single promise after all operations are complete.
static clear()
Erases all AsyncStorage. You probably don't want to call this - use
removeItem or multiRemove to clear only your own keys instead. Returns a
Promise object.
static getAllKeys()
Gets all known keys. Returns a Promise object.
static getItem(key: string)
Fetches the value of the given key. Returns a Promise object.
static mergeItem(key: string, value: string)
Merges existing value with input value, assuming they are stringified JSON. Returns a Promise object.
static multiGet(keys: Array)
multiGet results in an array of key-value pair arrays that matches the input
format of multiSet. Returns a Promise object.
multiGet(['k1', 'k2']) -> [['k1', 'val1'], ['k2', 'val2']]static multiMerge(keyValuePairs: Array<Array>)
multiMerge takes an array of key-value array pairs that match the output of
multiGet. It merges existing values with input values, assuming they are
stringified JSON. Returns a Promise object.
static multiRemove(keys: Array)
Delete all the keys in the keys array. Returns a Promise object.
static multiSet(keyValuePairs: Array<Array>)
multiSet takes an array of key-value array pairs that match the output of
multiGet. Returns a Promise object.
multiSet([['k1', 'val1'], ['k2', 'val2']]);static removeItem(key: string)
Removes the value of the given key. Returns a Promise object.
static setItem(key: string, value: string)
Sets the value of the given key. Returns a Promise object.