Lamis Chebbi 
Reactive Patterns with RxJS for Angular [EPUB ebook] 
A practical guide to managing your Angular application’s data reactively and efficiently using RxJS 7

Rx JS is a fast, reliable, and compact library for handling asynchronous and event-based programs. It is a first-class citizen in Angular and enables web developers to enhance application performance, code quality, and user experience, so using reactive patterns in your Angular web development projects can improve user interaction on your apps, which will significantly improve the ROI of your applications.
This book is a step-by-step guide to learning everything about Rx JS and reactivity. You’ll begin by understanding the importance of the reactive paradigm and the new features of Rx JS 7. Next, you’ll discover various reactive patterns, based on real-world use cases, for managing your application’s data efficiently and implementing common features using the fewest lines of code.
As you build a complete application progressively throughout the book, you’ll learn how to handle your app data reactively and explore different patterns that enhance the user experience and code quality, while also improving the maintainability of Angular apps and the developer’s productivity. Finally, you’ll test your asynchronous streams and enhance the performance and quality of your applications by following best practices.
By the end of this Rx JS Angular book, you’ll be able to develop Angular applications by implementing reactive patterns.