Bootstrap 4.1.1 Navbar not working with Angular 6

Question

I have been trying to work on Navbar with collapse menu and dropdown link using Bootstrap 4.1.1 and Angular 6 but somehow Navbar is not working at all. I can see elements co

Answer 1

just add umd directries popper in script.

 "./node_modules/popper.js/dist/umd/popper.min.js",