摘要： typeof instanceof var arr=[1,2,3,4,5]; console.log(typeof arr); object console.log(typeof {}); object console.log(arr instanceof Array); //true consol 阅读全文

摘要： function Car(name,speed){ this.name =name; this.speed =speed; // showname属于对象 } var car =new Car("奥迪",300); var car2 =new Car("迪奥",300); console.dir(c 阅读全文