Book Image

React and React Native - Third Edition

By : Adam Boduch, Roy Derks
Book Image

React and React Native - Third Edition

By: Adam Boduch, Roy Derks

Overview of this book

React and React Native, Facebook’s innovative User Interface (UI) libraries, are designed to help you build robust cross-platform web and mobile applications. This updated third edition is improved and updated to cover the latest version of React. The book particularly focuses on the latest developments in the React ecosystem, such as modern Hook implementations, code splitting using lazy components and Suspense, user interface framework components using Material-UI, and Apollo. In terms of React Native, the book has been updated to version 0.62 and demonstrates how to apply native UI components for your existing mobile apps using NativeBase. You will begin by learning about the essential building blocks of React components. Next, you’ll progress to working with higher-level functionalities in application development, before putting this knowledge to use by developing user interface components for the web and for native platforms. In the concluding chapters, you’ll learn how to bring your application together with a 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 (33 chapters)
Section 1: React
Section 2: React Native
Section 3: React Architecture

When to avoid lazy components

It might be tempting to make most of your React components lazy components that live in their own bundle. After all, there isn't much extra work that needs to happen in order to set up separate bundles and to make lazy components. There are some downsides to this though. If you have too many lazy components, your app is going to end up making several HTTP requests to fetch them – at the same time. There's no benefit to having separate bundles for components that are used on the same part of the app. You're better off trying to bundle components together in a way that one HTTP request is made to load what is needed on the current page.

A helpful way to think of this is to associate "pages" with bundles. If you have lazy page components, then everything on that page will also be lazy, yet bundled together with other components on the page. Let's build an example that demonstrates how to organize our lazy components. Let...