In this chapter we've looked at a number of patterns or approaches that improve the experience of developing JavaScript. We looked at a number of concerns around delivery to the browser. We also looked at how to implement plugins against a couple of libraries and extrapolated general practices. Next we took a look at how to work with background processes in JavaScript. Circuit breakers were suggested as a method of keeping remote resource-fetching sane. Finally, we examined how promises can improve the writing of asynchronous code.

In the next chapter we'll spend quite a bit more time looking at messaging patterns. We saw a little about messing with web workers but we'll expand quite heavily on them in the next section.