实现Object.create

Object.create()方法创建一个新对象，使用现有的对象来提供新创建的对象的__proto__。

Object.create1 = function (proto, prototyObject = undefined) {
  if (typeof proto !== 'object' && typeof proto !== 'function') {
    throw new TypeError('Object prototype may only be an Object or null.')
  }
  if (prototyObject == null) {
    throw new TypeError('Cannot convert undefined or null to object')
  }

  function F() {}
  F.prototype = proto
  const obj = new F()
  if (propertyObject != undefined) {
    Object.defineProperties(obj, propertyObject)
  }
  if (proto === null) {
   //创建一个没有原型对象的对象，Object.create(null)
    obj.__proto__ = null
  }
  return obj
}