关键词：面向对象
es6新增了类这个语法糖
// 类
class Cat{
constructor(name){
this.name = name;
}
getName(){
return this.name
}
}
// 继承
class Dog extends Cat{
constructor(color,name,...rest){
super (name);
this.color = color;
}
showColor(){
return this.color;
}
}
var c1 = new Cat('张无梦');
console.log(c1.getName());
var d1 = new Dog('赵归真','gray');
console.log(d1.getName());
console.log(d1.showColor());
console.log(c1.getName());
