legend-state VS MobX

There is not much to refactor in this simple example, but if we look closer to the the legend app state lib, we can see that set can take a callback with the previous state as parameter

For signals, Signia or Legend State.

I'd love to know what you think, and I'm also happy to answer any general JavaScript performance questions if you want since I've gone very deep into optimizing . See the GitHub: https://github.com/LegendApp/legend-state

After almost a year of development and iterating, we just released Legend-State 1.0. It's the fastest React state library and is very easy to use, based on Observables (Signals) with fine-grained reactivity and built-in persistence.

I'd love to know what you think, and I'm also happy to answer any general JavaScript performance questions if you want since I've gone very deep into optimizing .

https://github.com/LegendApp/legend-state

We do plan on adding a table view, and we've designed out a general idea of how it would work. And I'm very excited about it! But I'm not sure exactly when we'll start on it. Right now we're finalizing a new state/sync system (in open source at https://github.com/LegendApp/legend-state), then we'll add support for Markdown files, then a very cool new feature we're still exploring. I think you could expect sometime early next year we'll start working on expanding the view modes (but it's all still fluid so no promises!).

Legend-state - https://legendapp.com/open-source/state/

Legend-State is good.

States can also be organized in some central places (aka. stores). You can use Tini Store (very simple, ~50 lines) or other state management solutions such as MobX, TinyX, ...

Similarly to Promises/A+, this effort focuses on aligning the JavaScript ecosystem. If this alignment is successful, then a standard could emerge, based on that experience. Several framework authors are collaborating here on a common model which could back their reactivity core. The current draft is based on design input from the authors/maintainers of Angular, Bubble, Ember, FAST, MobX, Preact, Qwik, RxJS, Solid, Starbeam, Svelte, Vue, Wiz, and more…

MobX

Mutable-based: leverages proxy to create mutable data sources which can be directly written to or reactively read from. Candidates in this group are MobX and Valtio.

Looks good! FWIW I always felt the observable pattern much more intuitive than the redux/reducer style. Something like https://mobx.js.org/

Things get hairy in both, but redux pattern feels so ridiculously ceremonially to effectively manage a huge global state object with a false sense of "purity".

Observables otoh say "fuck it, I'm mutating everything, do what you want with it".

MobX Documentation

There's also others libraries like https://github.com/mobxjs/mobx which aren't specific to RN but can be used in any JS environment.

Valtio is like simplified MobX

Link: https://mobx.js.org