<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
</head>
<body>
</body>
<script>
class Person{
constructor(name, age){
this.name = name;
this.age = age;
}
sayHello(){
console.log(`你好 ${this.name}`);
}
}
class Student extends Person{
constructor(name,age,sex){
super(name,age)
this.sex = sex
}
learn(){
`666`
}
}
const zhangsan = new Student(`张三`,666,'男')
zhangsan.sayHello()
zhangsan.learn()
console.log(zhangsan instanceof Student);
console.log(zhangsan instanceof Person);
console.log(zhangsan instanceof Object);
console.log(zhangsan instanceof Array);
// let zhangsan = new Person('zhangsan',18);
// console.log(zhangsan.name);
// console.log(zhangsan.age);
// zhangsan,sayHello()
</script>
</html>
