 layout="fixed" width="500" height="180">
        <button on="tap:amp-web-push.unsubscribe">Unsubscribe from Notifications</button>
        <form method="post" action-xhr="/send-push" target="_top">
            <input type="submit" value="Send Web Push">
            <div submitting>
                Sending Push message...
            </div>
            <div submit-success>
                Web Push sent!
            </div>
            <div submit-error>
                Something went wrong.
            </div