リテラルと代入の構造化に関する知識の紹介

     let name="wei";
    let age=3;
    let obj={
        //简写变量，等同于name:name
        name,
        age
    }
        console.log(obj.name)//wei
    let qqq = {
      name: 'wrs',
      toString () {  // 'function' keyword is omitted here
        return this.name;
      }
    };


    console.log(qqq.toString()); // wrs

    var human = {
        breathe() {
            console.log('breathing...');
        }
    };
    var worker = {
        __proto__: human, //设置此对象的原型为human,相当于继承human
        company: 'freelancer',
        work() {
            console.log('working...');
        }
    };
    human.breathe();//输出 ‘breathing...’
    //调用继承来的breathe方法
    worker.breathe();//输出 ‘breathing...’