<!DOCTYPE html>
<!--
 | The EventTarget() constructor, when invoked, must return a new EventTarget.
 |   https://dom.spec.whatwg.org/#dom-eventtarget-eventtarget
 -->
<html>
<head>
  <style>
    body {
      background-color: red;
    }
    body.event-target-is-constructible {
      background-color: green;
    }
  </style>
</head>
<body>
  <script>
    new EventTarget();
    document.body.classList.add('event-target-is-constructible');
  </script>
</body>
</html>