Why there is no information about get() in the docs?`

[eisterman]

Hello everyone, today I was searching around how to create a "getter-like" structure in a store, and I found in the documentation that when you create a store you have, together with set(), a get() function so I though this was what I needed.

To my surprise, in all the documentation there is not a single place where it's said how this function is used, what it does, etc.
At the end I found an answer on stackoverflow and here in an old issue from 2020 (for context: #132 (comment) ) but the question remains.

Why there is no information on this machinery inside the official documentation on https://zustand.docs.pmnd.rs/getting-started/introduction ? Do you have plan to add more on it on the documentation?

[dbritto-dev]

@eisterman I thought that set and get functions are clear as their names, what you want to know or what are your questions?

[eisterman]

Given the example from the comment:

const useAuth = create((set, get) => ({
    user: {username: undefined, authLevel: 0},
    signedIn: () => !!get().user.username,
    thing: 123,
    setSomething: (thing) => set((state) => { thing: thing }),
})}

It is not obvious in my opinion that signedIn needs to be called in the selector like

const signedIn = useAuth(state => state.signedIn())

instead of like when you work with a setter function:

const setSomething = useAuth(state => state.setSomething)

where you extract the setter and use it directly setSomething(123).

I wanted to know if this information is in the documentation somewhere for the future

[dbritto-dev]

@eisterman but that go completely on the userland you can even use something instead of setSomething and forgot that needs to be called

[dbritto-dev]

btw, may this can help you https://stackblitz.com/edit/zustand-computed-fields-and-inferred-types?file=README.md