This responsive navigation menu stacks items into a dropdown menu when they overflow. When the user resizes the window the nav bar will shrink, any overflowing items will be removed from the visible list and get prepended to a list of vertically stacked items that are hidden. The user is notified of this action by a count badge next to a hamburger icon at the end of the menu, which acts as a dropdown trigger button for the hidden list.
The idea is: show as many navigation items as will fit horizontally with a UI toggle to show the rest.