1'use strict'
2
3module.exports = clone
4
5var getPrototypeOf = Object.getPrototypeOf || function (obj) {
6  return obj.__proto__
7}
8
9function clone (obj) {
10  if (obj === null || typeof obj !== 'object')
11    return obj
12
13  if (obj instanceof Object)
14    var copy = { __proto__: getPrototypeOf(obj) }
15  else
16    var copy = Object.create(null)
17
18  Object.getOwnPropertyNames(obj).forEach(function (key) {
19    Object.defineProperty(copy, key, Object.getOwnPropertyDescriptor(obj, key))
20  })
21
22  return copy
23}
24