Unlocking the Power of Angular Signals: Why They Trump RxJS in Angular 17

A photograph of the author: Brandon Whitaker

By: Brandon Whitaker

Angular 17.3 brings a breath of fresh air to the world of web development with its cutting-edge features and enhancements. Among the standout additions is the introduction of signal-based components—a game-changer in component communication. While RxJS has long been a staple for handling asynchronous operations in Angular, Signals offer a compelling alternative, boasting a range of benefits that make them a superior choice in many scenarios. Signal-based components are components where all inputs, outputs and queries are not dependent on RxJS and use Angular Signals instead. In this article, we’ll explore why Angular Signals shine brighter than RxJS in Angular 17 and why they should be your preferred approach.

1. Simplicity and Clarity

One of the primary advantages of Angular Signals over RxJS is their simplicity and clarity. While RxJS provides a powerful toolset for reactive programming, it comes with a steep learning curve. On the other hand, Signals offer a more intuitive and straightforward approach to component communication. With Signals, developers can easily define, emit, and handle events without the cognitive overhead associated with observables and operators.

2. Lightweight Footprint

Angular Signals come bundled with the framework itself, requiring no additional dependencies. This means that using Signals incurs zero overhead in terms of bundle size or performance. In contrast, integrating RxJS into an Angular project adds extra weight to the application bundle, potentially impacting load times and runtime performance. By opting for Signals, developers can keep their applications lean and efficient without sacrificing functionality.

3. Seamless Integration with Angular

Signals are native to Angular, meaning they seamlessly integrate with other Angular features and APIs. This tight integration ensures compatibility and consistency across the application, making it easier to maintain and debug code. On the other hand, incorporating RxJS into an Angular project introduces an additional layer of complexity and abstraction. While RxJS is undoubtedly powerful, its integration with Angular can sometimes feel disjointed, especially for developers unfamiliar with reactive programming paradigms.

4. Reduced Learning Curve

For developers new to Angular or reactive programming, Signals offers a gentler learning curve compared to RxJS. With Signals, developers can leverage their existing knowledge of Angular’s component architecture and lifecycle hooks without having to master complex reactive programming concepts. This lowers the barrier to entry for developers and accelerates the development process, allowing teams to deliver high-quality applications more efficiently.

5. Improved Readability and Maintainability

Signals promote cleaner, more readable code by providing a simple and declarative syntax for handling component interactions. Unlike RxJS, which often requires chaining multiple operators and callbacks, Signals offer a more linear and intuitive approach to event handling. This improves code maintainability and reduces the likelihood of errors or bugs creeping into the codebase. Additionally, Signals encourage a more modular and component-based architecture, making it easier to reason about and refactor code as the application grows.


In conclusion, Angular Signals emerge as a clear winner over RxJS in Angular 17, offering a host of benefits that make them the preferred choice for many developers. From their simplicity and lightweight footprint to seamless integration with Angular and reduced learning curve, Signals provide a compelling alternative to traditional reactive programming paradigms. By embracing Signals, developers can unlock new possibilities for building robust, efficient, and maintainable Angular applications. Whether you’re a seasoned Angular developer or just getting started, Signals are worth exploring as you embark on your next project in Angular 17.