Book Image

Architecting Angular Applications with Redux, RxJS, and NgRx

By : Christoffer Noring
Book Image

Architecting Angular Applications with Redux, RxJS, and NgRx

By: Christoffer Noring

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)

RxJS Basics

Reactive Extensions for JavaScript (RxJS) is a set of libraries created by Matt Podwysocky. Version 4 of the library is maintained and developed by Microsoft. Version 4 can be found at the following link:

Version 5 is a complete rewrite of version 4 and can be found at the following address: Its largest contributor is Ben Lesh, with other notable contributors including Andre Staltz. Version 5 is also Angular's choice of library for handling HTTP, among other things.

In this chapter, you will learn:

  • Which patterns make up RxJS
  • The core concepts of RxJS
  • How to manually create your own Observables and subscribe to them
  • The many ways you can create an Observable
  • The importance of managing cleanup
  • Understanding what lies beneath by learning to implement the core part of the RxJS library...