What We Learned

This was the biggest application you’ve built so far. Congratulations for making it all the way through. At this point, you should understand how observables can be single or multicasted and under what situations one would use either option. You also got some hands-on experience with Subjects in general, and Async/Replay subjects specifically.

A larger issue with the codebase you’ve accumulated is that it’s very dependent on global variables, with very little organization. In the next few chapters, you’ll start using Angular as a framework to properly structure your code. Angular also relies on Rx to handle all of an application’s events, allowing you to do even more with observables, such as validating forms and dealing with shaky network connections.