[JavaScript知识库]React 初学 - 类相关知识 - 个人笔记7

完整代码：

<script>
class Person {
	constructor(name,age){
		this.name = name
		this.age = age
	}
	speak(){
	console.log(`我叫${this.name},我的年龄是:${this.age}`)
	}
}
class Student extends Person {
	constructor(name,age,grade){
		super(name,age)
		this.grade = grade
	}
	// 重写从父类继承过来的方法
	speak(){
	console.log(`我叫${this.name},我的年龄是${this.age},我读的是${this.grade}年级`)
	}
}

const p1 = new Person('x1',11)
const p2 = new Person('x2',12)
const p4 = new Student('x4',14,'4')
console.log(p1)
console.log(p2)
console.log(p4)
p1.speak()
p2.speak()
p1.speak.call({name:'x3',b:33})
p4.speak()

</script>