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

Initializing properties and state

In this section, you'll see how to implement the initialization code in React components. This involves using life cycle methods that are called when the component is first created. First, you'll implement a basic example that sets the component up with data from the API. Then, you'll see how the state can be initialized from properties, and also how the state can be updated as properties change.

Fetching component data

When your components are initialized, you'll want to populate their state or properties. Otherwise, the component won't have anything to render other than its skeleton markup. For instance, let's say you want to render the following user list component:

import React from "react";

const ErrorMessage = ({ error }) => (error ? <strong>{error}</strong> : null);
const LoadingMessage = ({ loading }) => (loading ? <em>{loading}</em> : null);

export default ({ error, loading, users...