Fixed to top
to fix the navbar to the top of the page add a .navbar-fixed-top
class to the <nav> element.
WARNING: The fixed navbar will overlay your other content, unless you add padding to the top
of the <body>. Try out your own values or use our snippet below. Tip: By
default, the navbar is 50px high.
Fixed to bottom
Same thing as fixed to top but just with a .navbar-fixed-bottom
class.
Static Top
Create a full-width navbar that scrolls away with the page by adding
.navbar-static-top and include a .container or
.container-fluid to center and pad navbar content.
Note: you don't need to pad the body when using this class