CloseEvent

A CloseEvent is sent to clients using WebSockets when the connection is closed. This is delivered to the listener indicated by the WebSocket object's onclose attribute.

Constructor

CloseEvent(): Creates a new CloseEvent.

Properties

This interface also inherits properties from its parent, Event.

CloseEvent.codeRead only: Returns an unsigned short containing the close code sent by the server.
CloseEvent.reasonRead only: Returns a DOMString indicating the reason the server closed the connection. This is specific to the particular server and sub-protocol.
CloseEvent.wasCleanRead only: Returns a boolean value that Indicates whether or not the connection was cleanly closed.

Methods

This interface also inherits methods from its parent, Event.

CloseEvent.initCloseEvent(): Initializes the value of a CloseEvent created. If the event has already being dispatched, this method does nothing. Do not use this method anymore, use the CloseEvent() constructor instead.

Specifications

Specification
HTML Standard (HTML) # the-closeevent-interface

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
`CloseEvent`	13	12	8 ["Before Firefox 12, the close code `CLOSE_NORMAL` was used when the channel was closed due to an unexpected error or unspecified error condition.", "Before Firefox 8, the `WebSocket` close event was sent to the listener as a simple event."]	10	12.1	6	≤37	18	8	12.1	6	1.0
`CloseEvent`	16	14	8	No	?	6	≤37	18	8	?	6	1.0
`code`	15	12	8	10	≤15	6	≤37	18	8	≤14	6	1.0
`initCloseEvent`	No	12-79	8-41	No	No	No	No	No	8-41	No	No	No
`reason`	15	12	8	10	≤15	6	≤37	18	8	≤14	6	1.0
`wasClean`	13	12	8	10	≤15	6	≤37	18	8	≤14	6	1.0