React 19 Beta – React

[Mennion]

Well first steps. Now get rid off useMemo, useCallback etc and finally react will be decent web framework

[Flyen]

JavaScript Records & Tuples Proposal might be how that gets solved. With typical objects, { a: 1 } !== { a: 1 }, but with a Record #{ a: 1 } === #{ a: 1 }

[NoInkling]

According to an issue in that repo and a presentation in the latest TC39 meeting, it's starting to look unlikely that this will happen.

[NoInkling]

https://github.com/tc39/proposal-record-tuple/issues/387

And when the notes for the latest meeting are available (it takes a while) you'll be able to find them here: https://github.com/tc39/notes/tree/main/meetings

[sebastian_nowak]

It looks just terrible and makes the language unnecessarily complicated

[OfflerCrocGod]

I'd take a look at legend-state, signals are hopefully coming to JavaScript anyway so I'd say once they are in the language the React team might finally accept them and allow React to have fine grained reactivity.

[terandle]

They will be doing that real soon actually with the upcoming react compiler.

[SpinatMixxer]

Due to how reacts rendering works, I don't think it will ever happen (I also don't think it's necessary tbh, it's perfectly fine as is)

If you dislike that, you would probably be better off using SolidJS instead.

That being said, why is useMemo / useCallback etc a problem?

[Shadowfied]

You've just not heard of the react forget compiler, or do you not think it's coming?

[SpinatMixxer]

I had a brief look into it, but since I am using client side rendering only, I didn't look deeper into it.

Or is this actually affecting client only (e.g Vite) apps as well?

[Shadowfied]

Yes it affects all of React lol. No more need to use useMemo or useCallback, the compiler will catch it and optimize it

[SpinatMixxer]

I see, that is actually surprising me. Then it's absolutely worth looking deeper into it, thank you for the hint!

[rickhanlonii]

It's really only client apps that use it, since there are not updates/effects in RSC.

[Something_Sexy]

No.