js原型链测试

    console.log(Object.__proto__ === Function.prototype);//true
    console.log(Function.__proto__ === Function.prototype);//true
    console.log(Object.__proto__ === Function.__proto__);//true
    console.log(Function.prototype.__proto__ === Object.prototype);//true

    function Fn() {}
    let fn = new Fn();
    console.log(Fn.__proto__ === Function.prototype);//true
    console.log(Fn.prototype.__proto__ === Object.prototype);//true
    console.log(fn.__proto__ === Fn.prototype); //true
    console.log(fn.prototype);  //undefined

    let c = new Object();
    console.log(c.prototype);   //undefined

    class MyObject {
        eat() {}
    }

    let obj = new MyObject();
    console.log(obj.prototype); //undefined
    console.log(MyObject.prototype);   // Object { constructor: class MyObject {} 和 eat: function eat()  }
    console.log(MyObject.prototype.__proto__ === Object.prototype);    //true

    let AObject = {
        strval: "hello",
        doWork() {}
    }

    console.log(AObject.prototype); //undefined