react-native-fs-store

React Native FS Based store, alternative to Asyncstorage with fallbacks.

[Releted Article] - (https://bhanu.io/react-native-asyncstorage-filesystem-based-alternative-4316aea3e11b)

Benefits

• Stores data in FileSystem, no more stuck promises in development
• API same as that to asyncStorage, drop-in replacement.

Cons

• Slower than AsyncStorage, as each operation is synced to file.
• Not reliable for parallel operations, should use bulk-update.

Installation process

Need to install react-native-fs

npm i react-native-fs react-native-fs-store

react-native link react-native-fs

Usage

import Store from "react-native-fs-store";
 
const Storage = new Store('default');
 
await Storage.setItem('unique_key', JSObject);
// You can use almost all methods available in AsyncStorage with same signature.
 
...
const JSObject = await Storage.getItem('unique_key');

Drop-In-Usage

Replace-

import { AsyncStorage } from "react-native";

with

import Store from "react-native-fs-store";
const AsyncStorage = new Store('default');

To Change the store to AsyncStorage in production & use the fs fallback in development (0.1.x onwards only)

import AsyncStorage from "react-native-fs-store/index";

You now use it exactly as you would use AsyncStorage.

await AsyncStorage.setItem('unique_key', JSObject);
// You can use all methods available in AsyncStorage with same signature.
 
...
const JSObject = await Storage.getItem('unique_key');

Methods implemented

getItem
setItem
removeItem
mergeItem
clear
getAllKeys
multiGet
multiSet
multiRemove
multiMerge
flushGetRequests *

Why is this needed ?

Well the need of the package comes from the current state of async-storage, which sometimes break in development mode only, there are no known fixes for the same, hence I wrote a simple fs based key store system. Relevant Issue link

What are the limitations.

Simulatenous Parallel operations are not reliable, you should use multi- methods for the time being.

• Note flushGetRequests is a dummy method which doesn't actually do anything but was added so that the library doesn't break if the method is referenced in development.