title: Bootstrap 4 - Navbar Header usage
body: <p>I'm kind of new at bootstrap, I was taught <code>alpha-4</code> btw, and while making the <code>navbar</code> on my site i found out a problem when it collapses and shows the 3-row-lines-icon of the menu, it overlapped the logo with <code>.navbar-brand</code>. I resolved this just by adding <code>pull-right</code> to it.</p>
  
  <p>Looks like this now, it actually works...</p>
  
  <pre><code>&lt;nav class="navbar navbar-dark bg-inverse navbar-fixed-top" id="navbar"&gt;
  
                  &lt;button class="navbar-toggler hidden-lg-up pull-right" type="button" data-toggle="collapse" data-target="#navbarContent"&gt; &amp;#9776;
  
                  &lt;/button&gt;
  
              &lt;a class="navbar-brand"  href="#"&gt;YO-Maps&lt;/a&gt;
  
  
              &lt;div class="collapse navbar-toggleable-md" id="navbarContent"&gt;
  
  
                    &lt;ul class="nav navbar-nav"&gt;
                      &lt;li class="nav-item"&gt;
                        &lt;a class="nav-link" href="#jumbotron"&gt;Home &lt;span class="sr-only"&gt;(current)&lt;/span&gt;&lt;/a&gt;
                      &lt;/li&gt;
                      &lt;li class="nav-item"&gt;
                        &lt;a class="nav-link" href="#about"&gt;About&lt;/a&gt;
                      &lt;/li&gt;
                      &lt;li class="nav-item"&gt;
                        &lt;a class="nav-link" href="#footer"&gt;Download&lt;/a&gt;
                      &lt;/li&gt;
                    &lt;/ul&gt;
                    &lt;form class="form-inline pull-sm-right"&gt;
                      &lt;input class="form-control" type="email" placeholder="Email"&gt;
                      &lt;input class="form-control" type="password" placeholder="Password"&gt;
                      &lt;button class="btn btn-success" type="submit"&gt;Login&lt;/button&gt;
                    &lt;/form&gt;
               &lt;/div&gt;
          &lt;/nav&gt;
  </code></pre>
  
  <p>And while checking out bootstrap 3 (v 3.3.2), I discover <a href="https://codepen.io/bootstrapped/pen/KwYGwq" rel="nofollow">in other examples</a> this was't even needed, because I think the .navbar-header was present...</p>
  
  <p>So my question is: <strong>Is this class important while implementing Bootstrap 4?</strong> The <a href="http://v4-alpha.getbootstrap.com/components/navbar/#collapsible-content" rel="nofollow" title="No mention of .navbar-header">official docs</a> doesn't mention it and I actually try it in my code and doesn't make any difference...and <em>Does it really makes "something" appart of being a sematic tag in Bootstrap 3?</em></p>