Summary

In this chapter, we saw how ECMAScript is a scripting language specification for modern JavaScript. ECMAScript 6, or ES6, was released in 2015. Through this chapter, we covered some of the various key points of ES6 and their differences from previous versions of JavaScript. We highlighted the rules of variable scoping, the keywords for declaring variables, fat arrow function syntax, template literals, enhanced object property notation, destructuring assignment, classes and modules, transpilation, and iterators and generators. You are ready to begin applying this knowledge to your professional JavaScript projects.

In the next chapter, we will learn what an asynchronous programming language is and how to write and understand asynchronous code.