This feature has been removed from the Web standards. Though some browsers may still support it, it is in the process of being dropped. 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

FeatureChromeEdgeFirefoxInternet ExplorerOperaSafari
Basic support No Yes8 — 41 No No No
FeatureAndroid webviewChrome for AndroidEdge mobileFirefox for AndroidOpera AndroidiOS SafariSamsung Internet
Basic support No No Yes8 — 41 No No ?

See Also

Document Tags and Contributors

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