code: function difference(object, base) {
    return transform(object, (result, value, key) => {
      if (!isEqual(value, base[key])) {
        result[key] = isObject(value) && isObject(base[key]) ? difference(value, base[key]) : value;
      }
    });
  }
docs: Deep diff between two object, using lodash
  @param  {Object} object Object compared
  @param  {Object} base   Object to compare with
  @return {Object}        Return a new object who represent the diff