observable VS Reactor

observable

• Proposal: Signals as a Built-In Primitive of JavaScript
  9 projects | news.ycombinator.com | 31 Mar 2024
• What We Need Instead of "Web Components"
  8 projects | news.ycombinator.com | 22 Dec 2023

  > especially since Observables have been widely available and actively worked on for a long time, without seeing wide adoption

  Take a look at "Userland libraries" section [0] of the proposal (almost certainly written by Ben). He argues that observables get reinvented in the userland in various libraries over and over again. It is a primitive, like a Promise, only better.

  [0] - https://github.com/WICG/observable?tab=readme-ov-file#userla...

  8 projects | news.ycombinator.com | 22 Dec 2023

  > except that "reactivity" does not meet the bar of developers collectively having landed on a solution to a common problem

  Now that everyone seems to be in love with signals, there is work going on in the web components community group to prepare a spec for a signal (or observable, not sure what they are trying to call it) primitive [0]. It seems that they are getting ready to bring it to TC39 as a proposal.

  (In the meantime, the Observable primitive from rxjs been given a go-ahead for browser implementation. There is a proposal ready [1], and I think I heard that it may already be in Chrome behind a flag [2].

  So yeah; it's gonna be fun. Especially if both groups call their primitive Observable :-)

  0 - https://github.com/webcomponents-cg/community-protocols/issu...

  1 - https://github.com/WICG/observable

  2 - https://nitter.net/BenLesh/status/1737174784406933599

• You Don't Need to “Learn” Svelte: Embracing the Simplicity of JavaScript
  2 projects | news.ycombinator.com | 4 Sep 2023

  Perhaps this falls into the repetitive boilerplate category you referred to, but if you want framework-agnostic domain objects that still work well with Svelte, create your own using the observer pattern.

  Create an object with a subscribe method and whatever other methods make sense for updating its state. Svelte will treat it like one of its stores, and it will work with the $ syntax. It can be used with React via its `useSyncExternalStore` hook. It can be used with SolidJS via its `from` utility.

  If you don't want to handle the set-up boilerplate, you could use another library like Effector or RxJS, but of course, that means another dependency. There is a gradual move to make something like this a part of the platform[1], but who knows when or if it will land.

  [1] https://github.com/domfarolino/observable

• Observable API Proposal
  6 projects | news.ycombinator.com | 28 Jul 2023

Reactor

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Tracking mentions began in Dec 2020.