title: Display "Enable JavaScript" message only when JavaScript is disabled
body: <p>I want to display to the user a message that says "please enable JavaScript" in the case that JavaScript is disabled. I want that message, and nothing else to be displayed when JavaScript is disabled.</p>
  
  <p>So, to do this, I can put the message in the DOM and hide all other elements with display:none. Then in JavaScript I can set the message to display hidden and show all other elements.</p>
  
  <p>But I get a flicker with this approach. The error message shows up for a while (especially on mobile browsers) before it gets hidden.</p>
  
  <p>How can I minimize the time the error message is displayed for?</p>