面向对象相关测试题目

你的JS面向对象真的很厉害么？那么请说出下面这些属性分别输出什么？

• Object.prototype.constructor

• Object.prototype.prototype

• Object.prototype.__proto__

• Object.constructor.prototype

• Object.constructor.constructor

• Object.constructor.__proto__

• Object.__proto__.constructor

• Object.__proto__.prototype

• Object.__proto__.__proto__

• Function.prototype.constructor

• Function.prototype.prototype

• Function.prototype.__proto__

• Function.constructor.prototype

• Function.constructor.constructor

• Function.constructor.__proto__

• Function.__proto__.constructor

• Function.__proto__.prototype

• Function.__proto__.__proto__

function Cat() {};

• Cat.prototype

• Cat.prototype.constructor

• Cat.prototype.__proto__

• Cat.__proto__

var cat = new Cat();

• cat.constructor

• cat.__proto__

var o = {};

• o.constructor

• o.prototype

• o.__proto__