JS中的面向对象5-Object.create和new Object

var Person = function(age) {
    this.age=age;
    this.say=function(){console.log('hello');}
};
var p=new Person(11);
var p1 = Object.create(p);

从console中可以发现，p成了p1的原型对象，p中的属性和方法都成了p1的原型方法。

Object.create的作用就是传入一个对象，给创建的新对象提供__proto__引用

多用在对象的继承中。

Object.create的实现方式

if (!Object.create) {
  Object.create = function(proto, propertiesObject) {
    if (typeof proto !== 'object' && typeof proto !== 'function') {
      throw new TypeError('Object prototype may only be an Object:' + proto);
    } else if (proto === null) {
      throw new Error("This browser's implementation of Object.create is a shim and doesn't support 'null'");
    }
    if (typeof propertiesObject != 'undefined') {
      throw new Error("This browser's implementation of Object.create is a shim and doesn't support a second argument");
    }

    function F() {};
    F.prototype = proto;
    return new F();
  }
}

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/create