CustomEvent

Note: This feature is available in Web Workers.

The CustomEvent interface represents events initialized by an application for any purpose.

Note: If used to attempt to communicate between a web extension content script and a web page script, a non-string detail property throws with "Permission denied to access property" in Firefox. To avoid this issue clone the object. See Share objects with page scripts for more information.

Constructor

CustomEvent(): Creates a new CustomEvent.

Instance properties

This interface inherits properties from its parent, Event.

CustomEvent.detail Read only: Returns any data passed when initializing the event.

Instance methods

This interface inherits methods from its parent, Event.

CustomEvent.initCustomEvent() Deprecated: Initializes a CustomEvent object. If the event has already been dispatched, this method does nothing.

Specifications

Specification
DOM Standard # interface-customevent

Browser compatibility

Report problems with this compatibility data on GitHub

	desktop					mobile							server
	Chrome	Edge	Firefox	Opera	Safari	Chrome Android	Firefox for Android	Opera Android	Safari on iOS	Samsung Internet	WebView Android	WebView on iOS	Deno	Node.js
`CustomEvent`
`CustomEvent()` constructor
`detail`
`initCustomEvent` Deprecated
Available in workers

Tip: you can click/tap on a cell for more information.

Full support: Full support
No support: No support
: Deprecated. Not for use in new websites.
: Has more compatibility info.