JavaScript is a powerful and popular computer programming language. It is considered beginner-friendly, but it is also versatile. When JavaScript is added to a website, that website springs to life with interactive features. It is a vital part of the web browsers in use today, telling the web pages how to behave. Along with the languages HTML and CSS, knowing JavaScript is an essential skill for all web developers. In this instructive volume, readers will explore where and how JavaScript was created, how it is used today, and where they can turn to begin learning JavaScript to accomplish great things.