This is an experimental technology
Check the Browser compatibility table carefully before using this in production.

The PushEvent() constructor creates a new PushEvent object. Note that the this constructor is exposed only to a service worker context.


var myPushEvent = new PushEvent(type, eventInitDict);


A DOMString defining the type of PushEvent. This can be push or pushsubscriptionchange.
eventInitDict Optional
An options object containing any initialization data you want to populate the PushEvent object with. The options are:
  • data: The data you want the PushEvent to contain, if any. When the constructor is invoked, the PushEvent.data property of the resulting object will be set to a new PushMessageData object containing bytes extracted from the eventInitDict data member.


var dataInit = {
  data : 'Some sample text'

var myPushEvent = new PushEvent('push', dataInit);

myPushEvent.data.text(); // should return 'Some sample text'


Specification Status Comment
Push API
The definition of 'PushEvent' in that specification.
Working Draft Initial definition.

Browser Compatibility

FeatureChromeEdgeFirefoxInternet ExplorerOperaSafari
Basic support42



442 3 No37 No
FeatureAndroid webviewChrome for AndroidEdge mobileFirefox for AndroidOpera AndroidiOS SafariSamsung Internet
Basic support No42 No



37 No4.0

1. From version 16: this feature is behind the Enable service workers preference.

2. Service workers (and Push) have been disabled in the Firefox 45 and 52 Extended Support Releases (ESR.)

3. Enabled only in Nightly, Developer Edition, and Beta channels.

4. Push enabled by default.

See also

Document Tags and Contributors

Contributors to this page: fscholz, chrisdavidmills
Last updated by: fscholz,