index.html

<!DOCTYPE HTML>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Optane adventure</title>
    <link rel='stylesheet' href="style.css"></link>
</head>
<body>
  <div class="topbar">
    <div class="datTitle">Its Optane time</div>
    <div class="buttons">
      <ul>
        <li>[<a href="#" data-action="hide-bottom" class="button">hide bottom</a>]</li>
        <li>[<a href="#" data-action="show-bottom" class="button">show bottom</a>]</li>
      </ul>
    </div>
  </div>
  <div class="panels">
    <div class="container editor"></div>
    <div class="container tree"></div>
    <div class="container guide"></div>
    <div class="container console"></div>
  </div>
  <script src="demo-bundle.js" type="text/javascript"></script>
</body>
</html>