JavaScript is the programming language of the web and is used by more software developers today than any other programming language. For nearly 25 years this best seller has been the go-to guide for JavaScript programmers, and this new edition has been fully updated to cover the 2020 version of JavaScript. You'll find engaging and illuminating example code throughout and new chapters covering classes, modules, iterators, generators, Promises, and async/await. This book is for programmers who want to learn JavaScript and web developers ready to take their understanding and mastery of the language to the next level.