title: Error parsing Bootstrap 4 in Netbeans 8.2
body: <p>I am doing a html5/JS application with Nodejs on Netbeans 8.2.
  I am doing the welcome page and I would like to use Bootstrap 4. But when I add bootstrap.min.css in my stylesheets folder I have an error, see the image below. 
  However when I add the bootstrap.min.css from Bootstrap 3.3.7 I have no issue.</p>
  
  <p><a href="https://i.stack.imgur.com/hbD7z.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/hbD7z.png" alt="image of error"></a></p>
  
  <p>Thanks</p>