Do Signals replace RxJS Observables?

День тому

👉 Post: js2brain.com/blog/rxjs-observ...
Signals recently gained popularity in frontend web development. They are implemented by modern web frameworks like Qwik and SolidJS. Also, Angular adopted them. But what exactly are they, and do they replace RxJS Observables altogether?
🎓 Website: js2brain.com
🎵 Music and SFX: ref.audiio.com/kmx6s7zy
🕐 Timestamps:
00:00 - Intro
00:43 - What is a Signal?
02:43 - What can we do with Signals?
03:32 - Fine-grained Reactivity
03:51 - Comparison

КОМЕНТАРІ: 10

@LePhenixGD 2 місяці тому

Amazing video showcasing signals and their difference with observables Btw signals are good for local state management for simple services and RxJS's observables are good for global state management (with NgRx for instance) and HTTP requests

@js2brain 2 місяці тому

Thanks for your feedback. :) And I think you are right. Sometimes the HTTP stuff may be overkill though: When you never intend to abort the request, a simple fetch() with Promise does the job.

@more-sun 3 місяці тому

What is an example of more complex problems that require RxJS?

@js2brain 3 місяці тому

One often mentioned example is an auto completion search. I showed another example over here: ukposts.info/have/v-deo/iJWbemyHn3qjtWg.html&si=nD-K_13i8-G0a1Hs Basically everywhere a lot of subscription and unsubscriptions is going on.

@yankotliarov9239 2 місяці тому

Basically anything that requires syncronuous effects or complex data transformations including integration with old angular api's like router, forms etc.

@saeidm4884 2 місяці тому

I think using merely promises and signals together you can do anything without need for observables.

@js2brain 2 місяці тому

Sure, you don't even need promises and signals. JavaScript was already turing complete pre-ES6. ;)

@wahoobeans 2 місяці тому

So a signal is basically an rxjs subject?

@js2brain 2 місяці тому

It's similar to the BehaviorSubject, I think. What's different is the subscription mechanism with createEffect(), and Signals are more integrated into the web framework for reactive rendering.