ES6

构造函数class 　　普通函数function

class Person {

//静态属性，放置在construction中

construction(name , age){

　　this.name = name

　　this.age = age

}

//原型方法

eat（）{

　　return `$(this.name)在吃饭`

}

sleep（）{

　　return `$(this.name)在睡觉`

 } 

}

let p1 = new Person ("Tom", 25)

//本质上js的继承逻辑是原型链

 

-------------------------------------

function Person (name，age) {

this.name = name;

this.age = age;

}

Person.prototype.eat = function () {

return this.name+"在吃"

}

Person.prototype.sleep = function () {

return this.name+"在睡"

}

let p1 = new Person("Kim", 20)

let p2 = new Person("Ben", 30)

console.log (p1.eat === p2.eat)//true