I am learning to use Bootstrap and playing with components, specifically the navbar.
My links/list items aren\'t showing. I have copied code directly from Bootstrap.
In Bootstrap 4, the navbar-expand-* class is needed to show the horizontal navbar, otherwise it will collapse into it's mobile state.
Make sure you've referenced it properly in the Codepen as https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-alpha.6/css/bootstrap.min.css
Or, use Codeply, and it will include the all the relevant libraries for you: Bootstrap 4 on Codeply
Here's the Navbar with Bootstrap 4.0.0: http://www.codeply.com/go/SmEyy7rg5S
Related: Disable responsive navbar in bootstrap 4