RxJS Cookbook for Reactive Programming

Build scalable, efficient applications with seamless async data handling and blazing-fast user experience by unleashing reactive programming with Angular

Key Features

• Master RxJS observables, operators, and subjects to improve your reactive programming skills
• Explore advanced concepts like error handling, state management, PWA, real-time, and event-driven systems
• Enhance reactive skills with modern web programming techniques, best practices, and real-world examples

Book Description

Building modern web applications that are responsive and resilient is essential in this rapidly evolving digital world. Imagine effortlessly managing complex data streams and creating seamless user experiences—this book helps you do just that by adopting RxJS to boost your development skills and transform your approach to reactive programming.

Written by a seasoned software engineer and consultant with a decade of industry experience, this book equips you to harness the power of RxJS techniques, patterns, and operators tailored for real-world scenarios. Each chapter is filled with practical recipes designed to tackle a variety of challenges, from managing side effects and ensuring error resiliency in client applications to developing real-time chat applications and event-driven microservices. You’ll learn how to integrate RxJS with popular frameworks, such as Angular and NestJS, gaining insights into modern web development practices that enhance performance and interactivity.

By the end of this book, you’ll have mastered reactive programming principles, the RxJS library, and working with Observables, while crafting code that reacts to changes in data and events in a declarative and asynchronous way.

What you will learn

• Manage error handling, side effects, and event orchestration in your Angular and NestJS applications
• Use RxJS to build stunning, interactive user interfaces with Angular
• Apply Angular testing strategies to ensure the reliability of your RxJS-powered applications
• Optimize the performance of RxJS streams
• Enhance progressive web app experiences with RxJS and Angular
• Apply RxJS principles to build state management in Angular
• Craft reactive and event-driven microservices in NestJS

Who this book is for

This book is ideal for intermediate-to-advanced JavaScript developers who want to adopt reactive programming principles using RxJS. Whether you’re working with Angular or NestJS, you’ll find recipes and real-world examples that help you leverage RxJS for managing asynchronous operations and reactive data flows across both your frontend and backend.

Table of Contents

1. Handling Errors and Side Effects in RxJS
2. Building User Interfaces with RxJS
3. Understanding Reactive Animation Systems with RxJS
4. Testing RxJS Applications
5. Performance Optimizations with RxJS
6. Building Reactive State Management Systems with RxJS
7. Building Progressive Web Apps with RxJS
8. Building Offline-First Applications with RxJS
9. Going Real-Time with RxJS
10. Building Reactive NestJS Microservices with RxJS

About the Author

Nikola Mitrović is a seasoned software engineer and consultant with experience that spans nearly a decade, with technical expertise in micro-frontend architecture and web performance, as well as technologies such as Angular, React, Next.js, Node.js, NestJS, NX, and AWS. He is an enthusiastic public speaker and has presented at some of the world’s largest tech conferences, sharing his passion for crafting exceptional web experiences. He has business domain expertise in EdTech, HealthTech, and Digital Identity. For the last couple of years, Nikola has been in leadership roles, inspiring a culture of technical excellence, continuous learning, collaboration, and psychological safety within the organization. He strongly believes in leading with empathy, honesty, and passion, empowering teams with trust and autonomy. Prior to this, Nikola was a partner, technical architect, and development lead at Vega IT, where he was recognized as the company’s MVP for three consecutive years (2022-2024).