<!DOCTYPE HTML>
<html manifest="">
<head>
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta charset="UTF-8">
<title>test</title>
<!-- The line below must be kept intact for Sencha Cmd to build your application
<script id="microloader" type="text/javascript" src="bootstrap.js"></script> -->
<link rel ="stylesheet" type="text/css" href="ext/packages/ext-theme-neptune/build/resources/ext-theme-neptune-all.css" />
<script type="text/javascript" src="ext/build/ext-all.js"></script>
<script type = "text/javascript" src = "ext/packages/ext-theme-neptune/build/ext-theme-neptune.js"></script>
</head>
<body>
<script>
Ext.define('Person',{
name : 'xiaozhang',
sayName : function() {
console.log(this.name);
}
});
Ext.define('Student',{
extend : 'Person'
});
var student = Ext.create('Student');
student.sayName();
</script>
</body>
</html>
什么版本的ext？ext-4.1.1a测试你的代码没有问题