<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <title>Page Title</title> <meta name="viewport" content="width=device-width, initial-scale=1"> </head> <body> <script> //创建Person类 class Person { //构造函数 constructor(name,age){ this.name = name; this.age = age; } //方法 say(){ alert(this.name) } } //创建Worker类 继承自 Person类 class Worker extends Person { //Worker类的构造函数 constructor(name,age,work){ //继承Person类中的属性 super(name,age); this.work = work; } //方法 sayWork(){ alert(this.work) } } //生成实例 let w = new Worker(‘李三‘,18,‘搬砖‘); //调用方法 w.say(); w.sayWork(); </script> </body> </html>
原文：https://www.cnblogs.com/javascripter/p/10422972.html