Using immer

While xoid's API surface is kept small intentionally, there's a way for extensions. If you'd like to add a .produce method that uses immer internally, you can do it like the following.

import { create } from 'xoid'
import { produce } from 'immer'

create.plugins.push((atom) => {
  atom.produce = (fn) => atom.update((s) => produce(s, fn))
})

If you're using TypeScript, simply apply the following module augmentation:

declare module 'xoid' {
  interface Atom<T> {
    produce: (fn: (draft: T) => void) => void
  }
  interface Stream<T> {
    produce: (fn: (draft: T) => void) => void
  }
}