This feature is no longer recommended. Though some browsers might still support it, it may have already been removed from the relevant web standards, may be in the process of being dropped, or may only be kept for compatibility purposes. Avoid using it, and update existing code if possible; see the compatibility table at the bottom of this page to guide your decision. Be aware that this feature may cease to work at any time.

The CloseEvent.initCloseEvent() method initializes the value of a close event once it's been created (normally using the Document.createEvent() method).

Events initialized in this way must have been created with the Document.createEvent() method. This method must be called to set the event before it is dispatched, using EventTarget.dispatchEvent(). Once dispatched, it doesn't do anything anymore.

Do not use this method anymore as it is deprecated.

Instead use specific event constructors, like CloseEvent(). The page on Creating and triggering events gives more information about the way to use these.


event.initMouseEvent(type, canBubble, cancelable, wasClean, reasonCode, reason);


the string to set the event's type to. Possible types for mouse events include: click, mousedown, mouseup, mouseover, mousemove, mouseout.
whether or not the event can bubble. Sets the value of Event.bubbles.
whether or not the event's default action can be prevented. Sets the value of Event.cancelable.
whether or not the connection was cleanly closed.
the reason of the close.
a DOMString describing the reason of the close in shuman-readable way.


This is no part of any specifications, though it was in some early drafts.

Browser compatibility

Update compatibility data on GitHub
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidEdge MobileFirefox for AndroidOpera for AndroidSafari on iOSSamsung Internet
Basic support
Chrome No support NoEdge Full support YesFirefox No support 8 — 41IE No support NoOpera No support NoSafari No support NoWebView Android No support NoChrome Android No support NoEdge Mobile Full support YesFirefox Android No support 8 — 41Opera Android No support NoSafari iOS No support NoSamsung Internet Android ?


Full support  
Full support
No support  
No support
Compatibility unknown  
Compatibility unknown
Experimental. Expect behavior to change in the future.
Experimental. Expect behavior to change in the future.
Non-standard. Expect poor cross-browser support.
Non-standard. Expect poor cross-browser support.

See Also

Document Tags and Contributors

Contributors to this page: connorshea, erikadoyle, teoli
Last updated by: connorshea,