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ExtendableMessageEvent()

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

Syntax

new ExtendableMessageEvent(type, init);

Parameters

type

A DOMString that defines the type of the message event being created.

init Optional

An initialization object, which should contain the following parameters:

  • data: The event's data — this can be any data 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

Browser compatibility

Desktop Mobile
Chrome Edge Firefox Internet Explorer Opera Safari WebView Android Chrome Android Firefox for Android Opera Android Safari on IOS Samsung Internet
ExtendableMessageEvent
51
17
44
Extended Support Releases (ESR) before Firefox 78 ESR do not support service workers and the Push API.
No
38
11.1
51
51
44
41
11.3
5.0

See also

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Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/API/ExtendableMessageEvent/ExtendableMessageEvent