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I'm experimenting around with Backbone.js and am simply trying to get the messages to pop up on my console screen. How ever, every time I do so an error keeps on appearing (noted below)

Uncaught TypeError: Expecting a function in instanceof check, but got [object Object] backbone.js:1032
_.extend.setElement backbone.js:1032
_.extend._ensureElement backbone.js:1104
Backbone.View backbone.js:986
child backbone.js:1531
(anonymous function) pageLoader.js:19
(anonymous function)

Here is the JavaScript file

(function ($){

window.PageLoader = Backbone.View.extend({
  el: $("section"),
  events: {
   "": "initialization",
    "click #aboutUs" : "aboutUs",
  },

  initialization: function(){
    console.log('pageLoader.js initialized\nHome page rendered');
  },

  aboutUs:function(){
    console.log('About us page rendered.');
  } 
});

var pageLoader = new PageLoader();
//pageLoader.initialization();
//pageLoader.aboutUs();

})(jQuery);

Also here is the HTML

<html>
  <head>
    <link rel="stylesheet" type="text/css" href="css/main.css">
    <meta />
    <meta />
    <title>Bus tours and tows</title>
  </head>
  <body>
  <div id="centerWrapper">
    <header>
      <h1>So and so Bus tours and tows</h1>
    <header/>
    <nav>
      <ul>
        <li><a href="">Home</a></li>
        <li><a href="#aboutUs">About us</a></li>
        <li><a href="">Tours</a></li>
        <li><a href="">Tows</a></li>
        <li><a href="">Schedule</a></li>
        <li><a href="">Contact</a></li>
      </ul>
    </nav>
    <section></section>
    <footer> &#169; Of So and so bus tours and tows. <br />
      <i>Questions regarding the construction of the website, please email</i>
      <a href="mailto: [email protected]">Web Master</a>
    </footer>
    <div id="jsFilesAndDepend">
       <!-- -->
       <!-- Filese that are dependant-->
       <script src="js/dependencies/underscore.js"></script>
       <script src="js/dependencies/backbone.js"></script>
       <script src="js/dependencies/jquery-1.10.1.js"></script>
       <script src="js/pageLoader.js"></script>
       <script src=""></script>
       <script src=""></script>
    </div>
  </div>
  </body>
</html>

I am new to Backbone.JS. Thank you for helping.

I'm experimenting around with Backbone.js and am simply trying to get the messages to pop up on my console screen. How ever, every time I do so an error keeps on appearing (noted below)

Uncaught TypeError: Expecting a function in instanceof check, but got [object Object] backbone.js:1032
_.extend.setElement backbone.js:1032
_.extend._ensureElement backbone.js:1104
Backbone.View backbone.js:986
child backbone.js:1531
(anonymous function) pageLoader.js:19
(anonymous function)

Here is the JavaScript file

(function ($){

window.PageLoader = Backbone.View.extend({
  el: $("section"),
  events: {
   "": "initialization",
    "click #aboutUs" : "aboutUs",
  },

  initialization: function(){
    console.log('pageLoader.js initialized\nHome page rendered');
  },

  aboutUs:function(){
    console.log('About us page rendered.');
  } 
});

var pageLoader = new PageLoader();
//pageLoader.initialization();
//pageLoader.aboutUs();

})(jQuery);

Also here is the HTML

<html>
  <head>
    <link rel="stylesheet" type="text/css" href="css/main.css">
    <meta />
    <meta />
    <title>Bus tours and tows</title>
  </head>
  <body>
  <div id="centerWrapper">
    <header>
      <h1>So and so Bus tours and tows</h1>
    <header/>
    <nav>
      <ul>
        <li><a href="">Home</a></li>
        <li><a href="#aboutUs">About us</a></li>
        <li><a href="">Tours</a></li>
        <li><a href="">Tows</a></li>
        <li><a href="">Schedule</a></li>
        <li><a href="">Contact</a></li>
      </ul>
    </nav>
    <section></section>
    <footer> &#169; Of So and so bus tours and tows. <br />
      <i>Questions regarding the construction of the website, please email</i>
      <a href="mailto: [email protected]">Web Master</a>
    </footer>
    <div id="jsFilesAndDepend">
       <!-- -->
       <!-- Filese that are dependant-->
       <script src="js/dependencies/underscore.js"></script>
       <script src="js/dependencies/backbone.js"></script>
       <script src="js/dependencies/jquery-1.10.1.js"></script>
       <script src="js/pageLoader.js"></script>
       <script src=""></script>
       <script src=""></script>
    </div>
  </div>
  </body>
</html>

I am new to Backbone.JS. Thank you for helping.

  • javascript
  • backbone.js
  • underscore.js
  • uncaught-exception
Share Improve this question edited Jan 8, 2014 at 22:05 Lorenzo B 33.4k24 gold badges118 silver badges195 bronze badges asked Jun 26, 2013 at 20:15 Josh VJosh V 1232 silver badges10 bronze badges
Add a ment  | 

1 Answer 1

Reset to default 9

You need to load jQuery before backbone, 

  <script src="js/dependencies/underscore.js"></script>
  <script src="js/dependencies/jquery-1.10.1.js"></script>
  <script src="js/dependencies/backbone.js"></script>

You also cannot define empty event key value pairs,

 events: {
 //   "": "initialization", <- this is invalid.
  "click #aboutUs" : "aboutUs",
 },

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