ExtendableMessageEvent.ExtendableMessageEvent()

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

The ExtendableMessageEvent() constructor creates a new ExtendableMessageEvent object instance.

Syntax

var myEME = new ExtendableMessageEvent(type, init);

Parameters

type
A DOMString that defines the type of the message event being created.
init Optional
An initialisation object, which should contain the following parameters:
  • data: The event's data — this can be any type.
  • origin: A DOMString that defines the origin of the corresponding service worker's environment settings object.
  • lastEventId: A DOMString that defines the last event ID of the event source.
  • source: The Client, ServiceWorker or MessagePort that sent the message.
  • ports: An array containing the MessagePort objects connected to the channel sending the message.

Examples

var init = {
             data : 'hello message',
             source : MessagePortReference,
             ports : MessagePortListReference
           }

var myEME = new ExtendableMessageEvent('message', init);

Specifications

Specification Status Comment
Service Workers
The definition of 'ExtendableMessageEvent()' in that specification.
Working Draft Initial definition.

Browser compatibility

Update compatibility data on GitHub
DesktopMobile
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidEdge MobileFirefox for AndroidOpera for AndroidiOS SafariSamsung Internet
Basic support
Experimental
Chrome ? Edge ? Firefox Full support 45
Notes
Full support 45
Notes
Notes Service workers (and Push) have been disabled in the Firefox 45 & 52 Extended Support Releases (ESR).
IE No support NoOpera ? Safari No support NoWebView Android No support NoChrome Android ? Edge Mobile ? Firefox Android Full support 45Opera Android ? Safari iOS No support NoSamsung Internet Android ?

Legend

Full support  
Full support
No support  
No support
Compatibility unknown  
Compatibility unknown
Experimental. Expect behavior to change in the future.
Experimental. Expect behavior to change in the future.
See implementation notes.
See implementation notes.

See also

Document Tags and Contributors

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