具体代码如下所示：
<!DOCTYPE html>
<html lang=en>
<head>
<meta charset=UTF-8>
<title>Document</title>
[removed][removed]
<style>
</style>
</head>
<body>
<div id=box>
</div>
[removed]
var Aaa=Vue.extend({//继承出来一个Vue类Aaa
template:'<h3>我是标题3
