devmodeStringHash.ts

function devmodeStringHash(input: object | string | number | null) {
  let nextId = 0;
  const seen = new WeakMap<any, number>();

  return JSON.stringify(input, (_, v) => {
    if (v !== null && typeof v === 'object') {
      const id = seen.get(v);
      if (id !== undefined) {
        return `__object__:${id}`;
      }
      seen.set(v, nextId);
      nextId += 1;
    }
    return v;
  });
}