title: Ask for permissions again after they have been denied in browser
body: <p>I'm trying to ask the user for permission again after he has denied permissions the first time. So if he click on my button enable notifications, after he has denied them the first time the browser should ask him again. According to this answer:</p>
  
  <p><a href="https://stackoverflow.com/questions/24472601/notification-popup-doesnt-appear-in-chrome/25119803#25119803">Notification popup doesn&#39;t appear in chrome</a></p>
  
  <p>It's not possible, but I don't know if this has changed since 2014.</p>
  
  <pre><code>if (window.Notification || Notification.permission === 'denied') {
     Notification.requestPermission(status =&gt; {
     // do something
     });
  }
  </code></pre>