Q:

External resource in jsfiddle is undefined

I have made this github repo https://github.com/hollowdoor/dom_autoscroller_demo
For some reason this jsfiddle referencing the repo doesn't work: http://jsfiddle.net/gh/get/library/pure/hollowdoor/dom_autoscroller_demo/tree/master/Demo
The external resources are left undefined. 
I have looked at other answers on stackoverflow, and none of those seem to address my specific problem. 
let wtf = "stack overflow doesn't like jsfiddle without code?" 

A:

There is a redirect on the external resouce that loads the dragula library. 
It would seem JS Fiddle doesn't follow it.  
Updating the resource to the redirected link works.  
i.e. Using https://unpkg.com/dragula@3.7.2/dist/dragula.js instead of https://unpkg.com/dragula/dist/dragula.js
http://jsfiddle.net/3q9wjc2s/1/
Yep, StackOverflow isn't suited to debugging issues with JSFiddle itself 
in situations like this due to the necessary protections against links.