cheat.js

const replaceSetMap = (object) => {
  if (object) {
    if (object.constructor === Set) return [...object];
    if (object.constructor === Map) return Object.fromEntries(object);
  }
  return object;
};

const firstScan = ($, needle, { replacer = replaceSetMap, seen = new WeakMap() } = {}) => {
  const found = [];
  const _decycle = (object, path = "$") => {
    if (replacer !== undefined) object = replacer(object);

    let ctor;
    if (object == null || !(ctor = object.constructor))
      return;
    if (ctor === Number || ctor === String || ctor === Boolean || ctor === RegExp || ctor === Date || ctor === RegExp || typeof object !== "object") {
      if(needle.constructor === Function ? needle(object) : object === needle) found.push({ path, value: object });
      return;
    }

    if (seen.has(object)) return;
    seen.set(object, path);

    if (ctor === Array) return object.map((value, key) => _decycle(value, `${path}[${key}]`));

    const result = { ...object };
    for (const key in result) _decycle(result[key], `${path}?.[${JSON.stringify(key)}]`);
    return result;
  };
  _decycle($);
  return found;
};

const nextScan = ($, found, needle) => found
  .map(({ path, value }) => ({ path, prev: value, value: eval(path) }))
  .filter(needle.constructor === Function ? needle : (x) => x.value === needle);