The parameter passed into the onnotificationclick handler, the NotificationEvent interface represents a notification click event that is dispatched on the ServiceWorkerGlobalScope of a ServiceWorker.

This interface inherits from the ExtendableEvent interface.


Creates a new NotificationEvent object.


Inherits properties from its ancestor, Event.

NotificationEvent.notification Read only
Returns a Notification object representing the notification that was clicked to fire the event.
NotificationEvent.action Read only
Returns the string ID of the notification button the user clicked. This value returns an empty string if the user clicked the notification somewhere other than an action button, or the notification does not have a button.


Inherits methods from its parent, ExtendableEvent.


Extends the lifetime of the event. Tells the browser that work is ongoing.


self.addEventListener('notificationclick', function(event) {
  console.log('On notification click: ', event.notification.tag);

  // This looks to see if the current is already open and
  // focuses if it is
    type: "window"
  }).then(function(clientList) {
    for (var i = 0; i < clientList.length; i++) {
      var client = clientList[i];
      if (client.url == '/' && 'focus' in client)
        return client.focus();
    if (clients.openWindow)
      return clients.openWindow('/');


Specification Status Comment
Notifications API
The definition of 'NotificationEvent' in that specification.
Living Standard Living standard.

Note: This interface is specified in the Notifications API, but accessed through ServiceWorkerGlobalScope.

Browser compatibility

BCD tables only load in the browser