ReferenceError：骨干未定义 - 尝试使用Parse.com Javascript SDK

我正在尝试为学校项目构建网站，iOS应用和Android应用，这需要我有一台服务器。我决定使用Parse，因为它是免费的，我已经将它用于iOS应用程序。虽然，我没有使用Parse的Javascript SDK的经验。ReferenceError：骨干未定义 - 尝试使用Parse.com Javascript SDK

问题：
我已经链接的所有需要的库在我的index.html文件，但是当我启动了网站，我收到以下错误：

ReferenceError: Backbone is not defined.

问：
是什么导致这个错误？我该如何解决它？

从我读过的SDK构建在Backbone.js之上，我必须链接Underscore.js，因为Backbone.js依赖于它？

的index.html

<!DOCTYPE html> 
<html lang="en"> 
    <head> 
    <meta charset="utf-8"> 
    <meta http-equiv="X-UA-Compatible" content="IE=edge"> 
    <meta name="viewport" content="width=device-width, height=device-height, initial-scale=1"> 
    <!-- The above 3 meta tags *must* come first in the head; any other head content must come *after* these tags --> 
    <title>TutorMe - Home</title> 

    <!-- Bootstrap --> 
    <link href="./bootstrap-3.3.5/css/bootstrap.min.css" rel="stylesheet"> 

    <!-- HTML5 shim and Respond.js for IE8 support of HTML5 elements and media queries --> 
    <!-- WARNING: Respond.js doesn't work if you view the page via file:// --> 
    <!--[if lt IE 9]> 
     <script src="https://oss.maxcdn.com/html5shiv/3.7.2/html5shiv.min.js"></script> 
     <script src="https://oss.maxcdn.com/respond/1.4.2/respond.min.js"></script> 
    <![endif]--> 

    <link href="./css/index.css" rel="stylesheet"> 

    <script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/underscore.js/1.8.3/underscore-min.js"></script> 
    <script type="text/javascript" src="http://www.parsecdn.com/js/parse-1.5.0.min.js"></script> 

</head> 

<body> 

    <script type="text/javascript" src="./app/models/database.js"></script> 

    <!-- jQuery (necessary for Bootstrap's JavaScript plugins) --> 
    <script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.3/jquery.min.js"> </script> 
    <!-- Include all compiled plugins (below), or include individual files as needed --> 
    <script src="./bootstrap-3.3.5/js/bootstrap.min.js"></script> 
</body> 

</html>

database.js

Parse.initialize("X", "X"); 

    var Student = Backbone.Model.extend({ 

    }); 

    var StudentList = Backbone.Collection.extend({ 
    model: Student 
    }); 

    var StudentListController = Backbone.View.extend({ 

    initialize: function() { 
    } 
    });

编辑：

如果我Backbone.js的链接，我得到了以下错误：

[Error] TypeError: undefined is not an object (evaluating 'i.extend') 
    (anonymous function) (backbone-min.js, line 1) 
[Error] ReferenceError: Can't find variable: Backbone 
    global code (database.js, line 3)

代码：

<script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/backbone.js/1.2.2/backbone-min.js"></script>

来源

2015-08-28 Jonathan

强调JS，却忘了骨干JS在你提供的代码中。 –

@JSantosh，当我链接主干时，我得到另一个错误以及原始错误。请看我更新的问题。 – Jonathan

看起来就像你不挂你的backbone.js文件

<script src="/path/to/backbone.js"></script>

或链接到CDN您链接

<script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/backbone.js/1.2.2/backbone-min.js"></script> 
<script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/backbone.js/1.2.2/backbone-min.map"></script> 
<script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/backbone.js/1.2.2/backbone.js"></script>

来源

2015-08-28 02:29:23 Pindo

当我链接主干时，我得到另一个错误以及原始错误。请看我更新的问题。 – Jonathan

修正了它。我在underscore.js之前连接backbone.js。吉兹... – Jonathan

ReferenceError：骨干未定义 - 尝试使用Parse.com Javascript SDK

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