title: How can we have Flash of Unstyled Content if CSS is render blocking?
body: <p>I have heard these two statements:</p>
  
  <ol>
  <li><em>CSS is render-blocking</em></li>
  <li><em>We can have Flash of Unstyled Content</em></li>
  </ol>
  
  <p>now the second statement needs rendering and if CSS blocks rendering how can we have such unstyled content?</p>
  
  <p>PS: tag <code>javascript</code> added to increase the reach of the question to the web community</p>