Easily highlight new or unread items by adding a
<span class="badge"> to links, Bootstrap navs, and more.
When there are no new or unread items, badges will simply collapse (via CSS's
:empty selector) provided no content exists within.
Badges won't self collapse in Internet Explorer 8 because it lacks support for the
Adapts to active nav states
Built-in styles are included for placing badges in active states in pill navigations.