简单理解js es6中class只是语法糖

class只是语法糖，但本质上依旧是基于原型的继承

    function Phone(brand, price){
        this.brand = brand;
        this.price = price;
    }
    Phone.prototype.call = function(){
        console.log("打电话");
    }
    let Huawei = new Phone("华为",5999);
    Huawei.call();
    console.log(Huawei);

 

class写法

    //class
    class Phone{
        //构造方法 只能叫constructor
        constructor(brand, price){
            this.brand = brand;
            this.price = price;
        }
        // 方法只能用该语法  方法名+()+{}的形式
        call(){
            console.log("打电话");
        }
    }
    let Huawei = new Phone("华为",5999);
    console.log(Huawei);