es6-类的继承

class Introduce {
    //ES6中新型构造器
    constructor(name) {
        this.name = name;
    }
    //实例方法
    sayName() {
        console.log('My name is '+this.name);
    }
}
//类的继承 使用 extends 关键字
class Programmer extends Introduce {
    constructor(name) {
        //直接调用父类构造器进行初始化 使用super()方法
        super(name);
    }
    program() {
        console.log("I'm coding web...");
    }
}
//测试我们的类
var introduce=new Introduce('dummy');
lucy=new Programmer('lucy');
introduce.sayName();//输出 ‘My name is dummy’
lucy.sayName();//输出 ‘My name is lucy’
lucy.program();//输出 ‘I'm coding...’