Method to equal nested objects

DeepEqual.ts

const deepEqual = (objA: any, objB: any, map = new WeakMap()) => {
  if (Object.is(objA, objB)) {
    return true;
  }

  if (objA instanceof Date && objB instanceof Date) {
    return objA.getTime() === objB.getTime();
  }

  if (objA instanceof RegExp && objB instanceof RegExp) {
    return objA.toString() === objB.toString();
  }

  if (typeof objA !== 'object' || objA === null || typeof objB !== 'object' || objB === null) {
    return false;
  }

  if (map.get(objA) === objB) {
    return true;
  }
  map.set(objA, objB);

  const keysA = Reflect.ownKeys(objA);
  const keysB = Reflect.ownKeys(objB);

  if (keysA.length !== keysB.length) {
    return false;
  }

  for (let i = 0; i < keysA.length; i++) {
    if (!Reflect.has(objB, keysA[i]) || !deepEqual(objA[keysA[i]], objB[keysA[i]], map)) {
      return false;
    }
  }

  return true;
}