Book Image

React Native Cookbook. - Second Edition

By : Daniel Ward
4 (1)
Book Image

React Native Cookbook. - Second Edition

4 (1)
By: Daniel Ward

Overview of this book

If you are a developer looking to create mobile applications with maximized code reusability and minimized cost, React Native is what you need. With this practical guide, you’ll be able to build attractive UIs, tackle common problems in mobile development, and achieve improved performance in mobile environments. This book starts by covering the common techniques for React Native customization and helps you set up your development platforms. Over the course of the book, you’ll work through a wide variety of recipes that help you create, style, and animate your apps with built-in React Native and custom third-party components. You’ll also develop real-world browser-based authentication, build a fully functional audio player, and integrate Google Maps in your apps. This book will help you explore different strategies for working with data, including leveraging the popular Redux library and optimizing your app’s dataflow. You’ll also learn how to write native device functionality for new and existing React Native projects and how app deployment works. By the end of this book, you'll be equipped with tips and tricks to write efficient code and have the skills to build full iOS and Android applications using React Native.
Table of Contents (17 chapters)

Synchronizing locally persisted data with a remote API

When using a mobile app, network connectivity is something that is often taken for granted. But what happens when your app needs to make an API call, and the user has just lost connectivity? Fortunately for us, React Native has a module that reacts to the network connectivity status. We can architect our application in a way that supports the loss of connectivity by synchronizing our data automatically as soon as the network connection is restored.

This recipe will show a simple implementation of using the NetInfo module to control whether or not our application will make an API call. If connectivity is lost, we will keep a reference of the pending request and complete it when the network access is restored. We will be using http://jsonplaceholder.typicode.com again to make a POST request to a live server.

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