Understanding Angular Signals: A New Era of Reactivity

Angular has always embraced powerful reactive programming concepts — from change detection to RxJS-based data flows. But with the introduction of Signals, Angular now offers a simpler and more intuitive way to handle reactivity natively, without relying entirely on RxJS or @Input() bindings. In this post, we’ll explore what Angular Signals are, how they work, and when you should use them in your applications. ⚡ What Are Signals in Angular? Signals are a new reactive primitive introduced in Angular to track and respond to changes in state. Unlike RxJS Observables, which rely on subscriptions and streams, Signals offer a push-based, dependency-tracked model, making change detection more predictable and efficient. Think of them as reactive variables that automatically update anything that depends on them.

Apr 29, 2025 - 12:18

Understanding Angular Signals: A New Era of Reactivity

Angular has always embraced powerful reactive programming concepts — from change detection to RxJS-based data flows. But with the introduction of Signals, Angular now offers a simpler and more intuitive way to handle reactivity natively, without relying entirely on RxJS or @Input() bindings.

In this post, we’ll explore what Angular Signals are, how they work, and when you should use them in your applications.

⚡ What Are Signals in Angular?

Signals are a new reactive primitive introduced in Angular to track and respond to changes in state. Unlike RxJS Observables, which rely on subscriptions and streams, Signals offer a push-based, dependency-tracked model, making change detection more predictable and efficient.

Think of them as reactive variables that automatically update anything that depends on them.