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React and React Native by Adam Boduch

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Summary

This chapter introduced you to storing data offline in React Native applications. The main reason you would want to store data locally is when the device goes offline and your app can't communicate with a remote API. However, not all applications require API calls and AsyncStorage can be used as a general purpose storage mechanism. You just need to implement the appropriate abstractions around it.

You learned how to detect changes in network state in React Native apps as well. It's important to know when the device has gone offline so that your storage layer doesn't make pointless attempts at network calls. Instead, you can let the user know that the device is offline, and then synchronize the application state when a connection is available. ...

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