Notifications API

The Notifications API allows web pages to control the display of system notifications to the end user. These are outside the top-level browsing context viewport, so therefore can be displayed even when the user has switched tabs or moved to a different app. The API is designed to be compatible with existing notification systems, across different platforms.

Concepts and usage

On supported platforms, showing a system notification generally involves two things. First, the user needs to grant the current origin permission to display system notifications, which is generally done when the app or site initialises, using the Notification.requestPermission() method. This will spawn a request dialog, along the following lines:

From here the user can choose to allow notifications from this origin, block notifications from this origin, or not choose at this point. Once a choice has been made, the setting will generally persist for the current session. 

Note: As of Firefox 44, the permissions for Notifications and Push have been merged. If permission is granted for notifications, push will also be enabled.

Next, a new notification is created using the Notification() (en-US) constructor. This must be passed a title argument, and can optionally be passed an options object to specify options, such as text direction, body text, icon to display, notification sound to play, and more.

Nota: Esta característica está disponible en Web Workers

In addition, the Notifications API spec specifies a number of additions to the ServiceWorker API, to allow service workers to fire notifications.

Note: To find out more about using notifications in your own app, read Using the Notifications API.

Notifications interfaces

Defines a notification object.

Service worker additions

ServiceWorkerRegistration (en-US)
Includes the ServiceWorkerRegistration.showNotification() (en-US) and ServiceWorkerRegistration.getNotifications() (en-US) method, for controlling the display of notifications.
ServiceWorkerGlobalScope (en-US)
Includes the ServiceWorkerGlobalScope.onnotificationclick (en-US) handler, for firing custom functions when a notification is clicked.
NotificationEvent (en-US)
A specific type of event object, based on ExtendableEvent (en-US), which represents a notification that has fired.


Specification Status Comment
Notifications API Living Standard Living standard

Browser compatibility

We're converting our compatibility data into a machine-readable JSON format. This compatibility table still uses the old format, because we haven't yet converted the data it contains. Find out how you can help! (en-US)

Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari
Basic support 5webkit (en-US)[1]
4.0 (2.0)moz (en-US)[2]
22.0 (22.0)
Sin soporte 25 6[3]
Available in workers ? 41.0 (41.0) ? ? ?
Service worker additions


42.0 (42.0)[4] ? ? ?
Feature Android Android Webview Firefox Mobile (Gecko) Firefox OS IE Mobile Opera Mobile Safari Mobile Chrome for Android
Basic support ?


4.0 (2.0)moz (en-US)[2]
22.0 (22.0)
1.0.1moz (en-US)[2]
Sin soporte ? Sin soporte


Available in workers ? ? 41.0 (41.0) (Yes) ? ? ? ?
Service worker additions Sin soporte Sin soporte 42.0 (42.0)[4] (Yes) ? ? ? 42.0

[1] Prior to Chrome 22, the support for notification followed an old prefixed version of the specification and used the navigator.webkitNotifications object to instantiate a new notification. Prior to Chrome 32, Notification.permission was not supported.

[2] Prior to Firefox 22 (Firefox OS <1.2), the instantiation of a new notification was done with the navigator.mozNotification object through its createNotification() method. In addition, the Notification was displayed when calling the show() method, and supported only the click and close events (Nick Desaulniers wrote a Notification shim to cover both newer and older implementations.)

[3] Safari started to support notification with Safari 6, but only on Mac OSX 10.8+ (Mountain Lion).

[4] Firefox 42 has shipped with web notifications from Service Workers disabled.

Firefox OS permissions

When using notifications in a Firefox OS app, be sure to add the desktop-notification permission in your manifest file. Notifications can be used at any permission level, hosted or above:

"permissions": {
  "desktop-notification": {}

See also