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ExtendableMessageEvent.constructor

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 compatibilityUpdate compatibility data on GitHub

	Desktop
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari
Basic support	?	?	45 45 Service workers (and Push) have been disabled in the Firefox 45 & 52 Extended Support Releases (ESR).	No	?	No