title: Bootstrap Navbar list items/links not showing
body: <p>I am learning to use Bootstrap and playing with components, specifically the navbar.</p>
  
  <p>My links/list items aren't showing. I have copied code directly from Bootstrap.
  I'm hoping someone could please explain what I'm missing.</p>
  
  <pre><code>&lt;head&gt;
      &lt;meta charset="utf-8"&gt;
      &lt;meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no"&gt;
      &lt;meta http-equiv="x-ua-compatible" content="ie=edge"&gt;
      &lt;title&gt;NavBar&lt;/title&gt;
  
      &lt;!-- bootstrap css --&gt;
      &lt;link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-alpha.2/css/bootstrap.min.css" integrity="sha384-y3tfxAZXuh4HwSYylfB+J125MxIs6mR5FOHamPBG064zB+AFeWH94NdvaCBm8qnd" crossorigin="anonymous"&gt;
  &lt;/head&gt;    
  &lt;body&gt;      
      &lt;nav class="navbar navbar-toggleable-md navbar-light bg-faded"&gt;
          &lt;button class="navbar-toggler navbar-toggler-right" type="button" data-toggle="collapse" data-target="#navbarNavAltMarkup" aria-controls="navbarNavAltMarkup" aria-expanded="false" aria-label="Toggle navigation"&gt;
              &lt;span class="navbar-toggler-icon"&gt;&lt;/span&gt;
          &lt;/button&gt;
          &lt;a class="navbar-brand" href="#"&gt;Navbar&lt;/a&gt;
          &lt;div class="collapse navbar-collapse" id="navbarNavAltMarkup"&gt;
              &lt;div class="navbar-nav"&gt;
                  &lt;a class="nav-item nav-link active" href="#"&gt;Home &lt;span class="sr-only"&gt;(current)&lt;/span&gt;&lt;/a&gt;
                  &lt;a class="nav-item nav-link" href="#"&gt;Features&lt;/a&gt;
                  &lt;a class="nav-item nav-link" href="#"&gt;Pricing&lt;/a&gt;
                  &lt;a class="nav-item nav-link disabled" href="#"&gt;Disabled&lt;/a&gt;
              &lt;/div&gt;
          &lt;/div&gt;
      &lt;/nav&gt;      
      &lt;script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.4/jquery.min.js"&gt;&lt;/script&gt;
      &lt;script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-alpha.2/js/bootstrap.min.js" integrity="sha384-vZ2WRJMwsjRMW/8U7i6PWi6AlO1L79snBrmgiDpgIWJ82z8eA5lenwvxbMV1PAh7" crossorigin="anonymous"&gt;
      &lt;/script&gt;   
  &lt;/body&gt;
  </code></pre>