原型对象与实例对象之间的关系

var b=function(){

var one;

}

 

var c=new b();

console.group("第一组");

console.log("b=>"+b);

console.log("b.prototype=>"+b.prototype)

console.log("b.constructor=>"+b.constructor);

console.log("b.constructor.prototype=>"+b.constructor.prototype);

console.log("b.constructor==Function.constructor=>"+b.constructor==Function.constructor);

console.groupEnd();

 

 

            console.group("第二组");

console.log("c=>"+c);

console.log("c.prototype=>"+c.prototype)

console.log("c.constructor=>"+c.constructor);

console.log("c.constructor.prototype=>"+c.constructor.prototype);

console.log("c.constructor==Function.constructor=>"+c.constructor==Function.constructor);

console.groupEnd();

 

var r1=c.constructor.prototype==b.prototype;

var r2=c.constructor==b;

console.log(r1);

console.log(r2);

 

控制台打印结果:

第一组

b=>function (){

var one;

}

b.prototype=>[object Object]

b.constructor=>function Function() { [native code] }

b.constructor.prototype=>function () {}

false

 

第二组

c=>[object Object]

c.prototype=>undefined

c.constructor=>function (){

var one;

}

c.constructor.prototype=>[object Object]

false

true

true