Re-implementing Recoil APIs / article gists

typings.ts

// @see https://github.com/NoriSte/recoil-apis

/*
 * The internally stored Recoil values
 */
export type CoreRecoilValue<T> = {
  key: string;
  subscribers: Subscriber[];
} & (
  | {
      type: "atom";
      default: T;
      value: T;
    }
  | {
      type: "selector";
    }
);

export type Subscriber = () => void;