TS Types for Svelte 5 $state reactivity

[saturnonearth]

Describe the problem

At the moment, it is difficult to tell whether a variable that you are returning is reactive or not, as when you hover over the variable, it just shows the primitive value such as boolean. In Svelte 4, it didn't really matter because everything was reactive, but now, it needs to be more explicit (from my understanding).

Describe the proposed solution

It would be nice if when hovering over a state enabled variable that Typescript could point this out, such as SvelteState<string>.

Importance

would make my life easier

[Conduitry]

I doubt this is practical. We'd also need to worry about how the types of SvelteState<some_type> interact with everything else. I don't know that we can tell TypeScript 'SvelteState<some_type> behaves basically like some_type, but don't just drop the SvelteState<> part.

[brunnerh]

A boolean returned from a function will never be reactive since it's a primitive which is passed by value.

Encoding this in the types will not work anyway, though, since that is a separate thing. If you assign a state variable to a new constant, the type would transfer but the reactivity would be lost for primitives.

[trueadm]

This just isn't possible, sorry.