菜鸟教程在线编辑器

AI 编程工具
 
                <!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>菜鸟教程(runoob.com)</title>
</head>
<body>

<h2>JavaScript 类的方法</h2>

<p>类中如何定义方法</p>

<p id="demo"></p>

<script>
class Runoob {
  constructor(name, year) {
    this.name = name;
    this.year = year;
  }
  age() {
    let date = new Date();
    return date.getFullYear() - this.year;
  }
}
 
let runoob = new Runoob("菜鸟教程", 2018);
document.getElementById("demo").innerHTML =
"菜鸟教程 " + runoob.age() + " 岁了。";
</script>

</body>
</html>
              