Why is my .sticky-top class not working in Bootstrap 4?

Question

I am new to Bootstrap, trying to make responsive menu. For some reason sticky-top won\'t work. My browser does support it, and comparing my code to other working versions I

Answer 1

In my case the nav-bar was in a section, so sticky-top wasn't working. So, taking the nav-bar out of the section or making the section sticky-top works!