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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

Why components need a life cycle

React components go through a life cycle. In fact, the render() method that you've implemented in your components so far in this book is actually a life cycle method. Rendering is just one life cycle event in a React component.

For example, there are life cycle events for when the component is mounted to the DOM, when the component is updated, and so on. Life cycle events are yet another moving part, so you'll want to keep them to a minimum. As you'll learn in this chapter, some components do need to respond to life cycle events to perform initialization, render heuristics, clean up after the component when it's unmounted from the DOM, or handle errors thrown by the component.

The following diagram gives you an idea of how a component flows through its life cycle, calling the corresponding methods in turn:

Figure 7.1 – The functions used in the life cycle of React components

These are the two...

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