title: Bootstrap dropdown extended dropdowns (nested)
body: <p>I was wondering if it was possible to extend the dropdowns. I think you will understand what I mean once I describe it but I just don't know the name for it. So after you open the initial dropdown. You may have child elements that may open another dropdown-esque menu, in this case to the right, which may provide more precise options. So for instance...</p>
  
  <pre><code>Menu
    v
  option1 -&gt; precise1
  option2    precise2
             precise3
  </code></pre>
  
  <p>There doesn't seem to be anything in the components documentation describing this behaviour.</p>