ExtendableEvent: ExtendableEvent() constructor

Baseline Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since April 2018.

Note: This feature is only available in Service Workers.

The ExtendableEvent() constructor creates a new ExtendableEvent object.

Syntax

js
new ExtendableEvent(type)
new ExtendableEvent(type, options)

Parameters

type

A string with the name of the event. It is case-sensitive.

options Optional

An object that, in addition of the properties defined in Event(), can contain any custom settings that you want to apply to the event object. Currently no possible options are mandatory, but this has been defined for forward compatibility across the different derived events.