title: npm Overlay-navbar can't show icon?
body: <p>I used Navbar, but the icons are not showing, :((</p>
  <p><a href="https://i.stack.imgur.com/vnxJX.png" rel="nofollow noreferrer">thist my web</a>
  <a href="https://i.stack.imgur.com/D7MXC.png" rel="nofollow noreferrer">this my code</a></p>