You need to ... undefined
If you try to change a chapter while viewing a sample video at Packt Publishing you need to ... Undefined.
So… did you?
No. For some reason, this triggered a portishead craving in me (starting with their song "undenied" which I thought was called "undefined") ultimately leading to a chain smoking session watching beth gibbons sing roads 1245262th time ... Yes, indeed bad code can lead to lung cancer !
Undefined ... Totally !