Assign an id to a specific tabset in flexdashboard (Shiny)

Question

I would like to access the active tabset (not tab) in a flexdashboard for Shiny.

I found here the answer providing the JS code creating an input variable with the tab id, but I would like to have it for a tabset.

My code looks like this:

> TAB
> ==================
> 
> 
> ## Row {.tabset .tabset-fade}
> ---------------------
> 
> ### tabset A
> 
> ### tabset B

I would like to show programmatically either tabsetA or tabsetB. Any help is appreciated

I have no idea how to access it from JS