We've come a long way in this chapter.
We started by looking at the pyramid of doom and how Promise objects and async functions can help us tame asynchronous code. Because we're writing an Express application, we looked at how to use async functions in Express. We'll be using these techniques throughout this book.
We quickly moved on to writing the foundation of a real application with Express. At the moment, our application keeps its data in memory, but it has the basic functionality of what will become a note-taking application that supports real-time collaborative commenting on notes.
In the next chapter, we'll dip our toes into the water of responsive, mobile-friendly web design. Due to the growing popularity of mobile computing devices, it's become necessary to address mobile devices first before desktop computer users. In order to reach those millions of users a day, the Notes application users need a good user experience when using their smartphones...
