alinea/dist/dashboard/util/KeepPreviousData.js

Headless git-based CMS

import {
  atom
} from "../../chunks/chunk-WJ67RR7S.js";
import "../../chunks/chunk-NZLE2WMY.js";

// src/dashboard/util/KeepPreviousData.ts
import { assign } from "alinea/core/util/Objects";
function keepPreviousData(asyncAtom, options = {}) {
  let expected;
  const currentAtom = atom(options.initialValue);
  return assign(
    atom(
      (get, { setSelf }) => {
        const next = get(asyncAtom);
        const current = get(currentAtom);
        expected = next.then((value) => {
          const isSame = options.compare && current !== void 0 ? options.compare(value, current) : value === current;
          if (!isSame) setSelf(expected, value);
          return value;
        });
        return current ?? expected;
      },
      (get, set, forPromise, value) => {
        if (forPromise === expected) set(currentAtom, value);
      }
    ),
    { current: currentAtom }
  );
}
export {
  keepPreviousData
};