This is different from React. If you consider React to create the views, RxJS is the glue that holds your view and the data coming from the server (or any other remote location, for that matter) together. In other words, it's the business logic driven from asynchronous data. In chapter 10, we show you how you can use React with RxJS in the middleware, and Redux to connect them all together. This chapter is nice because it shows you that reactive ecosystem very well.