使用call或者apply借用原型链

    let hd={data:[12,54,6,2,53]};
    Object.setPrototypeOf(hd,{
        max(data){
            return data.sort((a,b)=>b-a)[0];

        }
    })
    console.log(hd.max(hd.data));
    let xj={
        lessons:{js:92,node:83,java:86},
        get data(){
            return Object.values(this.lessons);
        }
    };
    
    console.log(hd.max.call(null,Object.values(xj.lessons)));