Where React differs isn’t immutability, but where the mutation of state/effect boundary is (at the component/hooks-rules, versus something more fine grained).
In every possible approach, a state change needs some orchestration to produce rendering updates. The approach taken here looks like a subset of a common reactive approach, not dissimilar to say Solid with its createMutable Proxy-based store. That’s much more palatable to me (and I expect it would be to even a lot of React devs) than a less disciplined free-for-all mutability take (which effectively devolves to “build your own state<->render abstraction, or just maintain state in the view itself, probably both”).
Really, I think the main difference is that there's nothing in mutraction like a virtual DOM. Conceptually, it's dead simple. There are only real DOM nodes. This eliminates most of the use case for DOM refs as used in react, As you can just assign a JSX expression straight to a variable.
I've seen the word "orchestration" used before with respect to UI framework architecture. I must confess, I don't understand what it means. By default, in mutraction, most mutations are immediately applied to the corresponding DOM elements. You can wrap blocks in transactions, but probably most of the time, you wouldn't. Is that orchestration?
On the contrary! That alone is cause for me to give it another look. Stuff like state history is sorely lacking in the industry in general, and can enable powerful things like time travel debugging. I’m super curious to look into how it works when I get a chance.
> Really, I think the main difference is that there's nothing in mutraction like a virtual DOM.
Clarification (as I presume you know this, but in case anyone else isn’t familiar): this is also how Solid works.
> I've seen the word "orchestration" used before with respect to UI framework architecture. I must confess, I don't understand what it means. By default, in mutraction, most mutations are immediately applied to the corresponding DOM elements.
That’s exactly what I meant in this context. Without something like reactive Proxy tracking and binding to the produced DOM nodes, you’ll have:
1. Some mutable state, like objects and arrays and reassignable variable bindings.
2. Some view DOM.
3. Some code that manually assigns 1 to 2.
4. Some code that manually handles events in 2 and applies mutations to 1.
5. Recurse.
This can be as “bare metal” as direct DOM interaction, but usually tends to look more like jQuery. As popular as that is in HN comments, it’s really hard to manage in applications beyond a certain level of complexity (interactivity, feature scope, etc).
Anyway I did take a look at Mutraction and it looks great actually. I've just made a lot of abstractions at work, and always been a little surprised by how hard it is for people to get used to them. Of course maybe I'm just bad at it. But ultimately it's made me kind of anti-abstraction all around. If everyone was as good with vanilla HTML, CSS, and JS (actually I'll approve TS) as they are with React, the web would be a better place </opinion>
But you're right though. I still understand my own library better. However, I've really made an honest try to understand react (at least the client&DOM parts) as much as I practically could.
I think I'm on-board with your anti-abstraction POV too.
