Is there any way to collapse kanban board?

[Shum1905]

Now I'm setting a button as a header above kanban board.
I tried to set another id to identify the part to collapse other than the id for kanban element so I can collapse it when i click that button but it didn't work.

Is there any way to collapse kanban board?

Attached is the code that I'm using. (sorry i couldn't use markdown well...)
code-sample.txt

[marcosrocha85]

I think this fiddle can bring you some clue.

[Shum1905]

Seems great!!
Thank you very much!!