title: The selector "my-app" did not match any elements
body: <p>The problem is when I run my app, it works fine. But when I refresh it, most of the time I get below msg. </p>
  
  <blockquote>
    <p>The selector "my-app" did not match any elements</p>
  </blockquote>
  
  <p><strong>But the strange thing is that many times when I refresh my app it works  also.</strong> </p>
  
  <p>So ultimately I have a strange behavior of my app and unable to figure this out. 
  <br><strong>Sometimes it works sometimes doesn't...</strong></p>
  
  <p>Any suggestion, can't come up with code???</p>
  
  <p><strong><em>Note : I don't have complex structure or components yet but simple implementation.</em></strong></p>