Deep Equal comparison of two JavaScript objects

deepEqual.js

  const deepEqual = (object1, object2) =>{
    const keys1 = Object.keys(object1);
    const keys2 = Object.keys(object2);

    if (keys1.length !== keys2.length) {
      return false;
    }

    for (const key of keys1) {
      const val1 = object1[key];
      const val2 = object2[key];
      const areObjects = isObject(val1) && isObject(val2);
      if (
        (areObjects && !deepEqual(val1, val2)) ||
        (!areObjects && val1 !== val2)
      ) {
        return false;
      }
    }

    return true;
  }

  const isObject = (object) =>{
    return object != null && typeof object === "object";
  }