So far, we have discussed language constructs of JavaScript without looking at any specific language version. In this chapter, however, we will primarily focus on a few language features introduced in ES6. These features have a big impact on how you write JavaScript code. Not only do they improve the language significantly, they also offer several functional programming constructs unavailable to JavaScript programmers thus far.
In this chapter, we will take a look at newly introduced iterators and generators in ES6. With that knowledge, we will proceed to take a detailed look at the enhanced Collections constructs.