title: CodePen issue with Bootstrap 4
body: <p>Having a problem with CodePen and Bootstrap 4 , won't render a simple button, yet grid works fine: </p>
  
  <p><div class="snippet" data-lang="js" data-hide="false" data-console="true" data-babel="false">
  <div class="snippet-code">
  <pre class="snippet-code-html lang-html prettyprint-override"><code> &lt;button type="button" class="btn btn-primary"&gt;Primary&lt;/button&gt;</code></pre>
  </div>
  </div>
  
  Any help?</p>
  
  <p><a href="https://codepen.io/klasap/pen/OOjVep" rel="nofollow noreferrer">https://codepen.io/klasap/pen/OOjVep</a></p>