Book Image

Architecting Angular Applications with Redux, RxJS, and NgRx

Book Image

Architecting Angular Applications with Redux, RxJS, and NgRx

Overview of this book

Managing the state of large-scale web applications is a highly challenging task with the need to align different components, backends, and web workers harmoniously. When it comes to Angular, you can use NgRx, which combines the simplicity of Redux with the reactive programming power of RxJS to build your application architecture, making your code elegant and easy to reason about, debug, and test. In this book, we start by looking at the different ways of architecting Angular applications and some of the patterns that are involved in it. This will be followed by a discussion on one-way data flow, the Flux pattern, and the origin of Redux. The book introduces you to declarative programming or, more precisely, functional programming and talks about its advantages. We then move on to the reactive programming paradigm. Reactive programming is a concept heavily used in Angular and is at the core of NgRx. Later, we look at RxJS, as a library and master it. We thoroughly describe how Redux works and how to implement it from scratch. The two last chapters of the book cover everything NgRx has to offer in terms of core functionality and supporting libraries, including how to build a micro implementation of NgRx. This book will empower you to not only use Redux and NgRx to the fullest, but also feel confident in building your own version, should you need it.
Table of Contents (12 chapters)

Summary

This chapter has taken us deep into RxJS by covering topics such as hot, cold, and warm Observables, and what that generally means in terms of when to subscribe to a stream and how they share their Producer under certain conditions. Next up, we covered Subjects, and the fact that Observable isn't the only thing you can subscribe to. Subjects also allow as to append values to the stream whenever we want, and we also learned that there exist different types of Subjects, depending on the situation at hand.

We ventured deeper into an important topic, testing, and tried to explain the difficulty in testing asynchronous code. We talked about the current state of the testing situation and what libraries to use here and now for your testing scenarios. Lastly, we covered pipeable operators, and our new preferred way of importing and composing operators to ensure we end up...