We assume that you have already worked with React in some way, although this book should be understandable for complete beginners of React as well.

Please note that it is highly recommended that you write the code on your own. Do not simply run the code examples that are provided. It is important to write the code yourself in order to learn and understand it properly. However, if you run into any issues, you can always refer to the code example.

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/Learn-React-Hooks. 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!

We also provide a PDF file that has color images of the screenshots/diagrams used in this book. You can download it here: https://static.packt-cdn.com/downloads/9781838641443_ColorImages.pdf.

Visit the following link to check out videos of the code being run:

http://bit.ly/2Mm9yoC

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

CodeInText: Indicates code words in text, folder names, filenames, file extensions, pathnames, dummy URLs, and user input. Here is an example: "JavaScript classes provide a render method, which returns the user interface (usually via JSX)."

A block of code is set as follows:

class Example extends React.Component {

When we wish to draw your attention to a particular part of a code block, the relevant lines or items are set in bold:

    constructor (props) {
        super(props)
        this.state = { name: '' }
        this.handleChange = this.handleChange.bind(this)
    }

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

> npm run-script build

Bold: Indicates a new term, an important word, or words that you see onscreen. Here is an example: " Throughout this chapter, we are also going to learn about JSX, and new JavaScript features that have been introduced in ES6, up to ES2018."

In blocks of code, we use bold formatting to highlight changes in the code. Usually, we highlight new code using bold. If specified, we might also indicate which parts of code should be deleted by using bold formatting.