es6之类与对象

一、类的定义

 class Parent{
        constructor(name="mukewang"){
            this.name=name;
        }
    }

    let v_parant=new Parent("v");
    console.log("constructor",v_parant);

类的继承

// extends 用于继承父类

 //继承
class Parent{
        constructor(name="mukewang"){
            this.name=name;
        }
    }

    class Child extends Parent{

    }

    console.log("extend", new Child());

//继承传递参数
//super必须放在设置改变参数的前面
{
    class Parent{
        constructor(name="mukewang"){
            this.name=name;
        }
    }

    class Child extends Parent{
         constructor(name="child"){
             super(name);
             this.type="child"
         }
    }

    console.log("extend", new Child("hello"));
}

　　

get 、set 方法

    //getter,setter
    class Parent{
        constructor(name="mukewang"){
            this.name=name;
        }
        get longName(){
            return "mk"+this.name
        }
        set longName(value){
            this.name=value;
        }
    }

    let v=new Parent();
    console.log("getter",v.longName);
    v.longName="hello"
    console.log("getter",v.longName);

　静态方法

//静态方法
    class Parent{
        constructor(name="numewang"){
            this.name=name;
        }

        static tell(){
            console.log("tell");
        }
    }
    Parent.tell();

//静态属性
    class Parent{
        constructor(name="numewang"){
            this.name=name;
        }

        static tell(){
            console.log("tell");
        }
    }

    Parent.type="test";
    console.log("静态属性",Parent.type);
}