CloseEvent

Baseline Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since ⁨July 2015⁩.

Note: This feature is available in Web Workers.

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.

Instance properties

This interface also inherits properties from its parent, Event.

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