The CloseEvent() constructor creates a new CloseEvent.


var event = new CloseEvent(typeArg, closeEventInit);


Is a DOMString representing the name of the event.
closeEventInit Optional
Is a CloseEventInit dictionary, having the following fields:
  • "wasClean", optional and defaulting to false, of type long, indicates if the connection has been closed cleanly or not.
  • "code", optional and defaulting to 0, of type unsigned short, that is the connection close code sent by the server.
  • "reason", optional and defaulting to '', of type DOMString, that is a human-readable reason why the server closed the connection.

The CloseEventInit dictionary also accepts fields from the EventInit dictionary.


Specification Status Comment
HTML Living Standard
The definition of 'CloseEvent()' in that specification.
Living Standard Initial definition.

Browser compatibility

Update compatibility data on GitHub
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidFirefox for AndroidOpera for AndroidSafari on iOSSamsung Internet
CloseEvent() constructorChrome ? Edge ? Firefox Full support 8IE ? Opera ? Safari ? WebView Android ? Chrome Android ? Firefox Android Full support 8Opera Android ? Safari iOS ? Samsung Internet Android ?


Full support  
Full support
Compatibility unknown  
Compatibility unknown

See also

  • CloseEvent, the interface of the objects it constructs.