t is fired any time the <code><a href="../../js/html/ServiceWorkerRegistration.html#installing">ServiceWorkerRegistration.installing</a></code> property acquires a new service worker.</p></div></div><div class="field "><a name="pushManager"></a><h3 class="anchor"><code><span class="label">read only</span><a href="#pushManager"><span class="identifier">pushManager</span></a>:<a class="type" title="js.html.push.PushManager - The PushManager interface of the Push API provides a way to receive notifications fr