John Paxton has been programming in, consulting about, and training students on web technologies for more than 20 years. Studying history at Johns Hopkins University, he discovered that he spent more time in the computer lab than at the document archives. Since then, his career has oscillated between programming and training, working with various languages used in web development over the last 15 years. He now concentrates on JavaScript and Java, with the occasional nostalgic visits to Perl and XML. When not exploring a new JavaScript library, writing workbooks or hacking code, he enjoys drinking beer, watching movies, reading books, and traveling the world. Adam D. Scott is an engineering manager, web developer, and educator based in Connecticut. He currently works as the web development lead at the Consumer Financial Protection Bureau, where he focuses on building open source tools.

Additionally, he has worked in education for over a decade, teaching and writing curriculum on a range of technical topics. He is the author of WordPress for Education (Packt, 2012), the Introduction to Modern Front-End Development video course (O'Reilly 2015), the Ethical Web Development report series (O'Reilly 2016-2017), and JavaScript Everywhere (O'Reilly 2020). Shelley Powers has been working with, and writing about, web technologies--from the first release of JavaScript to the latest graphics and design tools--for more than 17 years. Her recent O'Reilly books have covered Node, the semantic web, Ajax, JavaScript, and web graphics. Shelley is also interested in food safety, sustainable agriculture, animal welfare, and writing.