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React and React Native

React and React Native

By : Adam Boduch, Roy Derks, Mikhail Sakhniuk
4.6 (17)
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React and React Native

React and React Native

4.6 (17)
By: Adam Boduch, Roy Derks, Mikhail Sakhniuk

Overview of this book

Over the years, React and React Native has proven itself among JavaScript developers as a popular choice for a complete and practical guide to the React ecosystem. This fourth edition comes with the latest features, enhancements, and fixes to align with React 18, while also being compatible with React Native. It includes new chapters covering critical features and concepts in modern cross-platform app development with React. From the basics of React to popular components such as Hooks, GraphQL, and NativeBase, this definitive guide will help you become a professional React developer in a step-by-step manner. You'll begin by learning about the essential building blocks of React components. As you advance through the chapters, you'll work with higher-level functionalities in application development and then put your knowledge to work by developing user interface components for the web and native platforms. In the concluding chapters, you'll learn how to bring your application together with robust data architecture. By the end of this book, you'll be able to build React applications for the web and React Native applications for multiple mobile platforms.
Table of Contents (36 chapters)
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1
Part 1 – React
15
Part 2 – React Native
31
Part 3 – React Architecture

Synchronizing application data

So far in this chapter, you've learned how to detect the state of a network connection and how to store data locally in a React Native application. Now, it's time to combine these two concepts and implement an app that can detect network outages and continue to function.

The basic idea is to only make network requests when you know for sure that the device is online. If you know that it isn't, you can store any changes in the state locally. Then, when you're back online, you can synchronize those stored changes with the remote API.

Let's implement a simplified React Native app that does this. The first step is to implement an abstraction that sits between the React components and the network calls that store data. We'll call this module store.js:

export function set(key, value) {
  return new Promise((resolve, reject) => {
    if (connected) {
      fakeNetworkData...

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