title: How to go with inline preview for user content input
body: <p>I have text area which allow the use to write markdown and share some links. In server side I have class with convert the markdown to html and fetch the urls. What I need is to provide the user to preview the inserted input before submit. Should I use:</p>
  
  <ul>
  <li>Short polling</li>
  <li>Long polling</li>
  <li>Websocket</li>
  <li>Server-Sent Events (with ActionController::Live::SSE)</li>
  </ul>
  
  <p>What is the best approach? And how background jobs would fit in the setup.</p>