The first thing we will create is the Bootstrap navbar. The navbar within Bootstrap is one of the most recognizable features within the Bootstrap framework due to the nature of how it works. So, to provide an example of how it works, if we navigate to the Bootstrap website and then to the Documentation tab, we have all the navigation elements across the top of the screen:

If we shrink the browser, we can see how the navigation shrinks as well. Then, when it hits the smaller screen, we get this hamburger menu, which, if we click on it, displays the navigation elements within it: