title: Bootstrap CDN not applying
body: <p>So I'm not sure if it's just because I'm a noob at this or what, but I can't get the bootstrap CDN to work. I copied the CDN from their website and pasted it into the code I was working on, and then a fresh page, as shown below and it's not applying on either. The weird thing is that the CDN from freecodecamp on their bootstrap portion works. What am I doing wrong?</p>
  
  <p>Heres the code</p>
  
  <pre><code>&lt;!doctype HTML&gt;
  &lt;html&gt;
    &lt;head&gt;
      &lt;title&gt;Bootstrap&lt;/title&gt;
      &lt;link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-beta.2/css/bootstrap.min.css" integrity="sha384-PsH8R72JQ3SOdhVi3uxftmaW6Vc51MKb0q5P2rRUpPvrszuE4W1povHYgTpBfshb" crossorigin="anonymous"/&gt;
      &lt;script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-beta.2/js/bootstrap.min.js" integrity="sha384-alpBpkh1PFOepccYVYDB4do5UnbKysX5WZXm3XxPqe5iKTfUKjNkCk9SaVuEZflJ" crossorigin="anonymous"&gt;&lt;/script&gt;
      &lt;/head&gt;
    &lt;body&gt;
      &lt;div class="navbar navbar-default"&gt;
      &lt;/div&gt;
    &lt;/body&gt;
  &lt;/html&gt;
  </code></pre>