The best way to learn a library than coding with it. If you follow the examples in this book and try them out as you read, I'm sure that your learning path will be quick. Also, make sure you set up your browser's development environment as indicated in Chapter 1: Introduction, so that you can catch programming errors quickly. Errors are a great learning resource, as long as you can find them and fix them. If you get stuck, you can always rely on the code examples.

When writing this book, I did my best to provide the most accurate information possible. All code listings were tested, and additional efforts were made to guarantee that all code examples are properly referenced in the book and work as expected. This book is based on D3.js version 5.9.2. I expect that the code examples should continue working with any 5.x version but there is a small possibility that some code may not work as expected if you are using a later version.

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.packt.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 & Errata.
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-D3.js. 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: http://www.packtpub.com/sites/default/files/downloads/9781838645571_ColorImages.pdf.

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, pathnames, dummy URLs, user input, and Twitter handles. Here is an example: "This code applies the .red class to each element of a collection."

A block of code is set as follows:

<p>See results in console log.</p>
 <div id="section">
     <p>Paragraph 1</p>
     <p>Paragraph 2</p>
 </div>
 <p>Paragraph 3</p>

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

npm install d3