<script> // 静态方法 class Person { constructor (name, age) { this.name = name; this.age = age; } sayHi () { console.log(hi,my name is </font><font style="color:#569cd6;">${</font><font style="color:#569cd6;">this</font><font style="color:#d4d4d4;">.</font><font style="color:#9cdcfe;">name</font><font style="color:#569cd6;">}</font><font style="color:#ce9178;">) } } class Student extends Person { constructor (name,age,number) { 指向父类 super(name,age) this.number = number } hello () { super.sayHi() console.log(学号是 </font><font style="color:#569cd6;">${</font><font style="color:#569cd6;">this</font><font style="color:#d4d4d4;">.</font><font style="color:#9cdcfe;">number</font><font style="color:#569cd6;">}</font><font style="color:#ce9178;">) } } const s1 = new Student(“tom”,18,101) s1.hello();

    </script>类的继承 extends - 图1