Where is it better to use Signals, and where to use RxJS?

Signals and RxJS are different approaches to reactive programming, and the choice between them depends on the task and context.

• Signals are a primitive of reactivity, typically used for local state management in UI frameworks (e.g., Solid.js, Angular Signals). They are simple, lightweight, and well-suited for reactive interface updates without complex logic.

• RxJS is a comprehensive library for working with streams of events and asynchronous data, supporting a rich set of operators for transformation, filtering, and combining streams. RxJS is suitable for complex event processing, working with asynchrony, integrating with WebSocket, timers, AJAX requests, etc.

Where to apply:

• Use Signals if you need to simply and efficiently track and react to state changes in the UI without complex event chains.

• Use RxJS if you require complex data stream processing, combining multiple event sources, managing asynchrony, and operation cancellation.

Example:

• In Angular, Signals are well-suited for reactive component state.
• RxJS is often used in Angular for working with HTTP requests, WebSocket, user events, etc.