Hey reactive JS folks! I'm working to bring Observables to the web platform by reviving a @thedomstandard proposal that got some attention a while ago. @BenLesh and I would love your feedback, so check out github.com/domfarolino/obser… if you want to do things like this soon:

Jul 28, 2023 · 1:38 PM UTC

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Replying to @domfarolino @thedomstandard @BenLesh
Nice, another 40 APIs added on top of existing 100 ways of doing same things. Glad we progress.
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Thanks mate!
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Replying to @domfarolino @thedomstandard @BenLesh
how does cleanup work? Also, this aligns very nicely with #EmberJS's choice of `on` to abstract add/remove Event Listener
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"Cleanup" happens by unsubscribing from an Observable. You can do this implicitly with methods like `takeUntil()` that handle that internally, or you can do it explicitly with AbortController. See this example: github.com/domfarolino/obser…

GitHub - WICG/observable: Observable API proposal

Observable API proposal. Contribute to WICG/observable development by creating an account on GitHub.

github.com
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Replying to @domfarolino @thedomstandard @BenLesh
Very interesting and beautiful API proposal. Would be awesome to create a library to test this and tweak it before making it official. I would use it, declarative programming rocks.
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Thanks a lot! I owe much to the robust reactive/Observables community that folks like Ben have been building up for years. If all goes as planned, this would be usable in a Chromium Origin Trial by a number of sites on an opt-in basis: github.com/GoogleChrome/Orig….
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Replying to @domfarolino @thedomstandard @BenLesh

ALT Self Isolation Only Day2 GIF

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Replying to @domfarolino @thedomstandard @BenLesh
This is amazing!! Please make this happen
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Replying to @domfarolino @thedomstandard @BenLesh
This is one of those things you look at and wonder why we have not had this a long time ago. It just makes sense 👍
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Replying to @domfarolino @thedomstandard @BenLesh
> SolidJS: An identical interface to this proposal is exposed for users to use. That's very very misleading, just look at the screenshot below. Moreover, "observable" and "from" might be Solid's least used APIs, it'd be very surprised if even 0.1% of users use them.
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Replying to @domfarolino @thedomstandard @BenLesh
Yessss! Amazing 🔥
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Replying to @domfarolino @thedomstandard @BenLesh
this is great
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Replying to @domfarolino @thedomstandard @BenLesh
As someone who works with three motion designers all named Gus, it's amusing that Chrome's DOM spec contributors are often named Dom.
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Replying to @domfarolino @thedomstandard @BenLesh
I appreciate you really believe in them. I’m concerned about anti-patterns I’ve seen: - Merging two observables requires time assumption hacks - Cold vs hot observables are invisible until runtime - One observable subscriber writing to another subject creates stateful spaghetti
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Replying to @domfarolino @thedomstandard @BenLesh
Please, no! To handle observables nicely, you need a lot of operators. All this world of specific semantics doesn't worth it. I wrote a lot of comparisons, and most of the code could be written imperatively and be pretty readable.
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Replying to @domfarolino @BenLesh @thedomstandard
What not copying RxJS instead? M'y point is that, what makes the true strength of RxJs are the operators. With the RxJS approach (the pipe method), you can create your own operators and you're not limited to a static list of them. Also...
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Replying to @domfarolino @thedomstandard @BenLesh
Please don't make subscription cause repeated side effects. The mess in rxjs where subscribing initiates the action and then having all the operators to stop that (like replay) is pretty horrible. Promises got this right.
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Replying to @domfarolino @thedomstandard @BenLesh
Oh damn, yes. Having a more powerful alternatives to "faking it with promises" or "bringing in a library that builds them from scratch" for basic/common observable use cases would be amazing. Just having a lazy/cold construct available by default would make my day.
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Replying to @domfarolino @thedomstandard @BenLesh
That’s incredible 👍
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Replying to @domfarolino @thedomstandard @BenLesh
Why not pipe?
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Replying to @domfarolino @thedomstandard @BenLesh
What's the story for adding custom operators without extending the prototype? We want to avoid a situation where libs cause conflicts and you're stuck with the built-in ops. That's the good thing about .pipe().
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Replying to @domfarolino @thedomstandard @BenLesh
This is terrible. You may have 100 ways to do one job, but all of the ways are complicated, and sometimes even can’t find a perfect way to do.
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Replying to @domfarolino @thedomstandard @BenLesh
please please dont bring observables anywhere
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Replying to @domfarolino @thedomstandard @BenLesh
😍
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Replying to @domfarolino @thedomstandard @BenLesh
Are there any news on that one? Also reiterating my question — why not pipe? Initial implementation of RxJS had all those methods on Observable class, but they moved on to a more composable alternative with pipe + operators.
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Replying to @domfarolino @thedomstandard @BenLesh
I feel like the journey from callback, to promise, to observable is pretty compelling - when I first started teaching student JS, I showed them the Observable proposal but had stopped as it was dead. Thanks for putting the effort in to bringing it back to life!
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Replying to @domfarolino @thedomstandard @BenLesh
Having the exact functionality from RxJs would be killer! I have never seen a more useful library on frontend development.
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Replying to @domfarolino @thedomstandard @BenLesh
Wow. This cud be a gamechanger
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Replying to @domfarolino @thedomstandard @BenLesh
Much tighter than the pattern match proposal which is a dogs breakfast imo
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Replying to @domfarolino @thedomstandard @BenLesh
If it was part of the platform and not js engine hence it could run multithread was fun. Otherwise it's just something that save some kb on the network quota
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Replying to @domfarolino @csuwildcat @thedomstandard @BenLesh
There’s a lot of things I love about this. Make the world more flapjax!!
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Replying to @domfarolino @thedomstandard @BenLesh
Maybe don't? WASM exists for any performance concerns.
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Replying to @domfarolino @jaffathecake @thedomstandard @BenLesh
This looks nice
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Replying to @domfarolino @thedomstandard @BenLesh

ALT Happened Before Will Happen Again GIF
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Replying to @domfarolino @thedomstandard @BenLesh
We went this route in android with Rx 7-8 years ago and let me tell you if not used properly these chain of observable code becomes a spaghetti mess real fast. Heck we are trying to go back to imperative code albiet with reactive properties. github.com/cashapp/molecule
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Replying to @domfarolino @thedomstandard @BenLesh
🤔dont u need to do JSON.parse before filter ?
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