“Uncaught TypeError: undefined is not a function” initializing Backbone collection

Question

I have a Backbone collection something like the following:

var FooCollection = Backbone.Collection.extend({
    model:Foo,

    initialize: function (attributes,         


        

Answer 1

I was experiencing the same problem. My problem was I had included my Model script after Collection Script:

<script src="scripts/collections/Classes.js"></script>
<script src="scripts/models/Class.js"></script>

To fix it I just had to move the Class.js up above Classes.js:

<script src="scripts/models/Class.js"></script>
<script src="scripts/collections/Classes.js"></script>

Cheers

Answer 2

In my actual code Foo was declared after FooCollection. Didn't realize that Javascript doesn't support forward declarations. [headdesk]