继承和原型、原型链

class Person {
	constructor(name, age) {
		this.name = name
		this.age = age
	}
	introduce(name, age, desc) {
		console.log(`我是${this.name},我今年${this.age}岁了，${this.desc}`)
	}
}


class Student extends Person {
	constructor(name, age, desc) {
		// 需要使用super调用父类构造方法才可以在构造函数中使用this
		super(name, age)
		this.desc = desc
	}


}

const student = new Student('小明', 18, '小明是个好学生')
student.introduce()