The evolution of Javascr ipt has been gradual but persistent. Over the course of the past

decade, the perception of Javascr ipt has evolved from a simple toy language into a respected

programming language used by corporations and developers across the globe to make incredible

applications. The modern Javascr ipt programming language—as it has always been—is

solid, robust, and incredibly powerful. Much of what I’ll be discussing in this book will show

what makes modern Javascr ipt applications so different from what they used to be. Many of

the ideas presented in this chapter aren’t new by any stretch, but their acceptance by thousands

of intelligent programmers has helped to refine their use and to make them what they

are today. So, without further ado, let’s look at modern Javascr ipt programming.