Deprecated: 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.

Non-standard: This feature is non-standard and is not on a standards track. Do not use it on production sites facing the Web: it will not work for every user. There may also be large incompatibilities between implementations and the behavior may change in the future.

The TransitionEvent.initTransitionEvent() method Initializes a transition event created using the deprecated Document.createEvent('TransitionEvent') method.

TransitionEvent created that way are untrusted.

Note: this method has been dropped during the standard process. It has been deprecated and is in the progress of been removed from most implementation. Do not use it anymore, use the standard constructor, TransitionEvent(), to create a synthetic TransitionEvent


initTransitionEvent(type, canBubble, cancelable, transitionName, elapsedTime)



A string identifying the specific type of transition event that occurred. Browsers always set it up to transitionend.


A boolean flag indicating if the event can bubble (true) or not (false).


A boolean flag indicating if the event associated action can be avoided (true) or not (false).


A string containing the name of the CSS property associated with the transition. This value is not affected by the transition-delay property.


Is float giving the amount of time the transition has been running, in seconds, when this event fired.

Return value

None (undefined).


This method is non-standard and not part of any specification, though it was present in early drafts of CSS Transitions.

Browser compatibility

BCD tables only load in the browser

See also