Third level inheritance doesn't work

Question

I have a few classes in CoffeeScript, that inherit from another class. The chain looks like this:

• Page
  • ChooserPage
    • YesNoChooserPage
  • CommentPage
  • SimplePage

This works beautifully but when I try to introduce one more level to the ChooserPage-chain, specifically MultipleYesNoChooserPage extends YesNoChooserPage, suddenly I get an error:

Uncaught TypeError: Cannot read property 'prototype' of undefined

I checked the existence of the classes and got the following results:

• Page exists
• ChooserPage exists
• YesNoChooserPage doesn't exist (undefined)
• MultipleYesNoChooserPage doesn't exist (undefined, obviously)

To compare: Without MultipleYesNoChooserPage defined:

With MultipleYesNoChooserPage defined:

Does CoffeeScript have some maximum limit I don't know of (and cannot find anything) or is there any other reason for that?

The classes are loaded in the correct order.

Answer 1

Okay, I got the solution, which happened by chance.

While trying to reproduce this I noticed that it doesn't happen outside the project. Because it confused me even more (I mean, how can the simple existence of a class let another one vanish) I completely deleted the file and re-created it. It worked, which let my confusion rise to an uncomprehensible level. Then it struck me:

To force the order of the files being loaded, they are named rather odd. In this case, this is what YesNoChooserPage and MultipleYesNoChooserPage are named like:

• YesNoChooserPage.coffee
• YZMultipleYesNoChooserPage.coffee

My editor (Sublime Text) lists them in the intended order but I noticed, the terminal doesn't. When I recreated the file, I accidentally named it 'YzMultipleYesNoChooserPage', causing a different order. This then worked.

Learned yet another thing.