Can a function be shared as a state?

[The-End-Hero]

like this:
export const changeItem = atom({ key: "changeItem", default: ()=>{}, });

[drarmstr]

Yes, you can store functions in atoms and selectors, but there are some nuances you may need to accomodate.

As the atom() documentation says:

Atoms can be set to a function, as long as it is pure, but to do so you may need to use the updater form of setters. (e.g. set(myAtom, () => myFunc);).

For atom families you may also need to wrap in a function as well.

Also take care not to use functions in values that may need to be serialized to check for value-equality, such as atom family parameters.