How do Signals (Angular 17+) improve reactivity compared to Observables?

Quick Answer Angular Signals (Angular 17+) are reactive primitives - a signal holds a value, and anything that reads it is automatically notified when the value changes. Unlike Observables, Signals are synchronous, simpler to use (no subscribe/unsubscribe), and enable fine-grained reactivity (only affected components update). Combined with computed() and effect(), they offer a simpler reactive model than RxJS for most UI state.

Answer

Signals store synchronous reactive values and update the UI automatically without subscriptions.

They simplify state management, eliminate manual cleanup, and improve performance. Observables remain essential for asynchronous workflows, but signals simplify UI state handling.

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How do Signals (Angular 17+) improve reactivity compared to Observables?

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