This is an experimental technology
Check the Browser compatibility table carefully before using this in production.
The Extendable
MessageEvent()
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
: ADOMString
that defines the origin of the corresponding service worker's environment settings object.lastEventId
: ADOMString
that defines the last event ID of the event source.source
: TheClient
,ServiceWorker
orMessagePort
that sent the message.ports
: An array containing theMessagePort
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. |
Editor's Draft | Initial definition. |
Browser compatibility
Feature | Chrome | Firefox (Gecko) | Internet Explorer | Opera | Safari (WebKit) |
---|---|---|---|---|---|
Basic support | (Yes) | 45.0 (45.0)[1] | No support | ? | No support |
init option |
51.0 | ? | ? | ? | ? |
Feature | Android | Android Webview | Firefox Mobile (Gecko) | Firefox OS | IE Mobile | Opera Mobile | Safari Mobile | Chrome for Android |
---|---|---|---|---|---|---|---|---|
Basic support | No support | No support | (Yes) | (Yes) | No support | ? | No support | (Yes) |
init option |
No support | No support | ? | ? | ? | ? | ? | 51.0 |
[1] Service workers (and Push) have been disabled in the Firefox 45 and 52 Extended Support Releases (ESR.)
See also
Document Tags and Contributors
Tags:
Contributors to this page:
chrisdavidmills,
jpmedley
Last updated by:
chrisdavidmills,