Angular Signal vs BehaviorSubject

[@ianvink]

Deborah, you are truly a treasure for the Angular community. You have the rare skills of being able to take complex tech and convert it to Human.

[@deborah_kurata]

What a wonderful compliment! Thank you so much!

[@rkrao8582]

This Signals series is amazing. Your teaching style is really good. If possible a future video on testing the Signals would be great addition to the series.

[@deborah_kurata]

Thank you! 🙏 Last I heard from the Angular team, they haven't yet worked on the testing story. I'll add it to the list and put something together when there is something ready. Thanks again!

[@daguttt]

Yes dude. I totally agree

[@souhaibkhadraoui9898]

I agree ! The teaching style is straight forward yet deep and it makes for great content

[@scellilisa]

even better (for me ^^): testing signals with cypress :)

[@zb2747]

Great video-straight to the point with clear explanations.

[@deborah_kurata]

Thank you! 😊

[@respostasimples]

Good to hear from you again Deborah, thanks for the explanation!

[@respostasimples]

can't wait for that video on signal-based inputs!

[@deborah_kurata]

Me too! Waiting for those features to be implemented in a release candidate. Then we'll be covering it!

[@cristobalcanas5189]

I love your videos!! You are the best at teaching. Thanks for this!! From Chile

[@deborah_kurata]

Wow, thank you! 😊

[@ShaharHar-Shuv]

I did not watch the entire video but I did not find any section that explains in what scenario would you prefer BehaviorSubject? My thinking is that you will never prefer it over signals, and I'm actually considering writing a script that automatically converts all BehaviorSubjects to signals.

[@tmegha4754]

Awesome, I am having a good understanding of signal, infact more signal series..Thank you

[@deborah_kurata]

Thank you! 🙏 I'm looking forward to doing more videos in this series!

[@muhamedkarajic]

What I personally would like to see maybe is how you would do most common operators with Signals when you have e.g. switchmap, map, combineLatest. Would you still use RxJS and forward the stream to the signal?

[@deborah_kurata]

Yes, you would still use RxJS for the pipeline. Then create a signal from the resulting Observable. I'll add to my list to do an example.

[@anutaNYC]

​@@deborah_kuratayes I'm still not clear how to use signals and then when I usually subscribe to get some data from repo how to do that I'm still not clear

[@celikart]

very good feature ın Angular, looking forward to hear more simplified

[@deborah_kurata]

Agreed! Thanks!

[@peymanebrahimi7756]

Excellent as always

[@deborah_kurata]

Thank you! 🙏

[@mitkogeorgiev3]

Thank you for this video Deborah. Can you include in your next videos this scenario: fetching data from API when we click on some button for example and managing this data in a service with signals ?

[@deborah_kurata]

Thank you! And I'll add that to the list!

[@kartheeknandini3767]

Excellent video ❤ from India

[@deborah_kurata]

Thank you! 🙏

[@daguttt]

Amazing video @deborah_kurata. Look forward to watch managing state with Signals 👀

[@deborah_kurata]

Thank you! I'm thinking of doing that one next ... I'm just concerned that it will get a little long and I know most prefer shorter videos. So I'm thinking about how to maybe divide it up?

[@radthenone]

I have this same question all times rxrj or signals i think signals angular 18 and up but angular 17 and less rxrj is better option

[@deborah_kurata]

Great way to look at it!

[@carolruo]

Excellent content

[@deborah_kurata]

Thank you so much!

[@andresmauriciofajardoolaya2721]

Hi Deborah, always glad to see your videos. I would like to know if there's a way to handle isLoading state when a signal is getting information from Observables. Thanks for these short videos

[@deborah_kurata]

Great to hear! I'll work up an example of isLoading. Thanks for the suggestion.

[@masumulu]

Hi Deb. Thanks for the video, it's really amazing! Also it could be the good adding source code link to the description! Waiting for next videos..

[@deborah_kurata]

Hey! Thank you for the kind words about the video. And thank you for the reminder. I hadn't merged in my changes into my GitHub. It's done now and you can find it here: github.com/DeborahK/Angular-Signals/tree/main/swVehicles-with-vehicle-signals 😀

[@masumulu]

​@@deborah_kurata Thanks again! I already find the link form your youtube profile 😄 Maybe for next videos we hope the see on the description 🙏

[@deborah_kurata]

Yes, it's in the description now. Thanks!

[@alejandromenganaperez4065]

Great videos, one question, if I start using signals with my app, should be safe to change all my components to OnPush right ?

[@deborah_kurata]

Thank you! And yes! Any component that does all it's binding with signals (or signals and RxJS) can be changed to OnPush.

[@muhamedkarajic]

Hi Deborah, thank you for the video! I got the main reasons why to switch I think not needing 'subscribe' and async is really a good point. What I wonder is if there is hope they implement it so that we get those benefits of change detection when using RxJS as well?

[@deborah_kurata]

Great to hear. Thank you! You can use OnPush change detection with RxJS *now* using the async pipe to get some of the benefits of improved change detection. I'm not certain what the plan for the async pipe will be in future versions (v17+). Whether they plan to include it in their new zoneless change detection or if they will phase it out. Is there a case when you'd really need an async pipe and can't create a signal from an Observable instead?

[@samanthaadrichem9446]

What does this do to performance, calling the 'signal function' cartItem() over and over in your template vs reading a single fixed variable?

[@deborah_kurata]

There should be no difference in performance between reading a variable and reading a signal. Longer term, Angular change detection will be modified to take advantage of signals, improving performance of binding to signals vs binding to variables. With normal variables, Angular doesn't track exactly what was changed, so runs change detection and regets all variable values to update the display. With signals, Angular will track the signals a template uses and will modify the display only for the changed signals. This could have a big impact on the performance of the UI.

[@samanthaadrichem9446]

@@deborah_kurata Very interesting! What we tend to do is make a template and bind the variable in async only once, then re-use the let version, so that there are not multiple async subscriptions to the same variable in a single template. Can't wait to use it, though i'll have to wait at least 4 more months XD we're always 1 version behind on Angular to wait out the big bugs/issues.

[@yuriinadilnyi3029]

brilliant video)

[@deborah_kurata]

Thanks!

[@POLELENDWALI-x7f]

❤❤

[@zenande699]

Great tutorial, but who tf uses vscode with light theme 😂

[@deborah_kurata]

Glad you liked the tutorial! I've thought that light theme was easier to see on a recording. 🤷‍♀️