title: How to Highlight and Display Default Validator Message?
body: <p>This <a href="https://stackblitz.com/edit/angular-p44rni?file=src/app/app.component.ts" rel="nofollow noreferrer">StackBlitz</a>, I'd like to learn how to:</p>
  <ol>
  <li>highlight the input box and make *<em>Required</em> in red</li>
  <li>display a DEFAULT error message from validator when it fails <code>minLength(4)</code></li>
  </ol>