I want to embed data into react-native app. I think we have to use asyncstorage. We can use rocksdb as storage for asyncstorage. Documentation does not give any example of this. Wondering how to use it with rocksdb.
Also, react-native docs mentions asyncstorage data being global. Does that mean asyncstorage data is accessible to all the apps?
AsyncStorage is a core react-native API that allows you to store key value pairs. It's global in that it is accessible within anywhere in the app but obviously not to all apps because of iOS sandboxing. It works on its own, as is, independently of any other database systems.
RocksDB is a native key-value store that currently only has a native implementation. If you want to use it in your react-native project, you or someone else will have to write an API (bridge) so that it can be used through js. And that would have nothing to do with AsyncStorage.
EDIT: Apparently AsyncStorage tries to use RocksDB on the native side if it exists. Otherwise, it seems to simply save the data in a text file. https://github.com/facebook/react-native/blob/master/React/Modules/RCTAsyncLocalStorage.m
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on project we have need use architecture, where getting data from API display on screens and storage in locale state. How this architecture implementing on React Native with using state managment libraries.
P.S. For data, with getting from API, we cannot be used global state.
You could try using React-Query for fetching data and React.Context for storing and providing data to children.
For a persistent storage you can use AsyncStorage
I have a database that changes its values constantly and I'm creating an app that displays that information using React Native.
My question is: how should I store that data in the application and how should I update that information every few seconds?
In the database I have a single table with a single record that I would have to download from time to time. I want to access that data from different screens.
I've seen Context and AsyncStorage to store the data and use it globally but I don't know which one is better or how to use it well.
You can use redux, Context, react hooks and AsyncStorage also. But using AsyncStorage is not the best option to manage a store. It will slow your app and you can use AsyncStorage to save username, tokens, sessions etc. In my opinion, using react hooks is the best method to manage a store.
You can also use MobX for state management easy to understand and also reliable
I am developing a feature like a cart of which data I want to use in multiple screens. Also, want to manage the view cart and clear cart items but locally only. What is the recommended way to go with?
1) AsyncStorage
2) Redux
Kindly help me and let me know if there is a misconception on my side.
AsyncStorage and Redux serve different purposes.
AsyncStorage is there to allow you to store data that is persisted between app instances (that is, between restarts of your app).
Redux is a state management system that is meant to solve the problem of moving state around components in react.
What you're describing can actually use both, where Redux is used for state management, and the redux store itself can be saved into AsyncStorage for later use. There are Redux related libraries that do just that, such as Redux-Persist.
I built a PWA with react, react-redux, react-router, and react-loadable. I built an app with Corona which uses a webview to point to the PWA. [The native app gives me access to features the PWA does have on iOS]. That works fine. However, the webview doesn't support service workers. As a result nothing gets cached and the app reloads the page every time it is opened.
Is there a way to store the js/css bundles using react-redux?
Perhaps another way to achieve storage (full or partial) to reduce the networking requirements on subsequent opens?
At the moment I am not looking to cache the API calls that happen to a database, but the actual components that are rendered (or the bundles that are loaded to render the components).
I expect this is not a new question, but I've found nothing so far... which leads me to think there is no good answer.
I think what you want does not fit with reduxs intentions as a state source. I think localstorage maybe a thing that could help your need.
Like duc mai pointed out, in a browser/webview environment you can usually use the localStorage or sessionStorage API to persist data.
When building with React, I use redux-persist to automatically save the redux state with every change. It persists the state as stringified json.
While creating apps with reactJS we need to persist the redux state data, because the store gets reinitialized when the browser is refreshed. Is this scenario applicable while creating mobile apps? I mean the mobile apps cannot be refreshed right?
So, while creating mobile apps with react native we need not have to bother about persisting the data fearing that the app will be refreshed? Please correct me if I'am wrong
Just like on desktop applications, your application can be closed, the device can restart, etc, and everything not persisted goes away.
You should store anything you don't want to lose in AsyncStorage or similar.
React-Native Redux can only persists data till application has terminated. You need to store require data in Asynchronous storage or can pull data from your server using APIs.