js设计模式与开发实践5

class Animal{
constructor(name){
this.name=name;
};
getName(){
return this.name;
}
}
class Dog extends Animal{
constructor(name){
super(name);
}
speak(){
return "woof"
}
}
var dog=new Dog("Scamp");
console.log(dog.getName()+" says "+dog.speak());