To get the most out of this book

As you go through the book, you will uncover how all the concepts come together when building web and mobile applications with React.

All code examples have been tested using React 16.13, React Native 0.62, Node.js 14.

Before you start, you will need the following things set up:

• A code editor
• A modern web browser
• Node.js

If you are using the digital version of this book, we advise you to type the code yourself or access the code via the GitHub repository (link available in the next section). Doing so will help you avoid any potential errors related to the copying and pasting of code.

Download the example code files

You can download the example code files for this book from your account at www.packt.com. If you purchased this book elsewhere, you can visit www.packtpub.com/support and register to have the files emailed directly to you.

You can download the code files by following these steps:

1. Log in or register at www.packt.com.
2. Select the SUPPORT tab.
3. Click on Code Downloads.
4. Enter the name of the book in the Search box and follow the onscreen instructions.

Once the file is downloaded, please make sure that you unzip or extract the folder using the latest version of:

• WinRAR/7-Zip for Windows
• Zipeg/iZip/UnRarX for Mac
• 7-Zip/PeaZip for Linux

The code bundle for the book is also hosted on GitHub at https://github.com/PacktPublishing/React-and-React-Native---Third-Edition. In case there's an update to the code, it will be updated on the existing GitHub repository.

We also have other code bundles from our rich catalog of books and videos available at https://github.com/PacktPublishing/. Check them out!

Conventions used

There are a number of text conventions used throughout this book.

CodeInText: Indicates code words in text, database table names, folder names, filenames, file extensions, path names, dummy URLs, user input, and Twitter handles. Here is an example: "The Query component takes a GraphQL query as a prop and returns an object with the state variables, loading, error, and data."

A block of code is set as follows:

import React, { Component } from 'react';
// Renders a "<button>" element, using
// "this.props.children" as the text.
export default class MyButton extends Component {
  render() {
    return <button>{this.props.children}</button>;
  }
}

Any command-line input or output is written as follows:

$ npm install -g create-react-native-app 
$ create-react-native-app my-project

Bold: Indicates a new term, an important word, or words that you see on screen. For example, words in menus or dialog boxes appear in the text like this. Here is an example: "Select System info from the Administration panel."