In this chapter, we have covered a few of JavaScript’s best and worst parts, especially the pitfalls that can cause issues performance-wise. We have seen how coding safe, reliable and highly-efficient JavaScript code might not be as exciting as using the latest shiny feature or as tempting as lazy coding, but will certainly help any JavaScript application be a part of the Faster Web.
In the next chapter, we will see how JavaScript is increasingly becoming a functional language and how this programming paradigm will be a vector for performance in the near future. We will take a quick look at upcoming language features that will help improve the performance of JavaScript applications.