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

Lazy list loading

In this section, you'll implement a different kind of list—one that scrolls infinitely. Sometimes, users don't actually know what they're looking for, so filtering or sorting isn't going to help. Think about the Facebook news feed you see when you log into your account; it's the main feature of the application and rarely are you looking for something specific. You need to see what's going on by scrolling through the list.

To do this using a FlatList component, you need to be able to fetch more API data when the user scrolls to the end of the list. To get an idea of how this works, you need a lot of API data to work with. Generators are great at this! So let's modify the mock that you created in the Fetching list data example so that it just keeps responding with new data:

function* genItems() {
let cnt = 0;

while (true) {
yield `Item ${cnt++}`;

const items = genItems();

export function fetchItems() {
return Promise.resolve...