nested objects' key

[MJT-Arthas]

May be could use the code blow to delete nested objects' key

function omit(obj, fields) {
  const keySet = new Set(fields);
  const shallowCopy = Object.assign({}, obj);
  deleteKey(shallowCopy);
  return shallowCopy;

  function deleteKey(obj) {
    Object.keys(obj).forEach((key) => {
      if (keySet.has(key)) {
        delete obj[key];
      } else if (
        Object.prototype.toString.call(obj[key]) === "[object Object]"
      ) {
        deleteKey(obj[key]);
      }
    });
  }
}