I have a D8 site with a Bootstrap 3 subtheme and two columns with one region and a block inside each.
I need to change the first column width (col-md-12) to take 100% width when the view block in the second column is empty, and to take just 50% (col-md-6) when it has something to display.
An easy way to achieve this without custom modules?
With this solution I can hide the second region, but how to make the regions talk together and change the first accordingly? Should I make one single region with two blocks within and then change column classes in the region twig template? Is it possible?
Thanx for your attention