whether it is supported and what it returns in
      those contexts. For example, try <code>XMLHttpRequest</code>,
      <code>registration</code>, or <code>location</code>:
    </p>

    <textarea id="inp" cols="80" rows="10"></textarea>

    <h3>Dedicated Worker output:</h3>
    <textarea id="dedicated" cols="80" rows="10"></textarea>
    <h3>Shared Worker output:</h3>
    <textarea id="shared" cols="80" rows="10"></textarea>
    <h3>Service Worker output:</h3>
    <textarea id="service" cols="80" rows="1