This is an experimental technology
Check the Browser compatibility table carefully before using this in production.

The TransitionEvent() constructor returns a newly created TransitionEvent, representing an event in relation with an transition.


transitionEvent = new TransitionEvent(type, {animationName: aPropertyName, 
                                             elapsedTime  : aFloat, 
                                             pseudoElement: aPseudoElementName});


The TransitionEvent() constructor also inherits arguments from Event().

Is a DOMString representing the name of the type of the TransitionEvent. It is case-sensitive and can only be: 'transitionend'.
animationName Optional
Is a DOMString containing the value of the animation-name CSS property associated with the transition. It defaults to "".
elapsedTime Optional
Is float giving the amount of time the animation has been running, in seconds, when this event fired, excluding any time the animation was paused. For an "animationstart" event, elapsedTime is 0.0 unless there was a negative value for animation-delay, in which case the event will be fired with elapsedTime containing  (-1 * delay). It defaults to 0.0.
pseudoElement Optional
Is a DOMString, starting with "::", containing the name of the pseudo-element the animation runs on. If the animation doesn't run on a pseudo-element but on the element, an empty string: "". It defaults to "".


Specification Status Comment
CSS Transitions
The definition of 'TransitionEvent()' in that specification.
Working Draft Initial definition.

Browser compatibility

We're converting our compatibility data into a machine-readable JSON format. This compatibility table still uses the old format, because we haven't yet converted the data it contains. Find out how you can help!

Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari
Basic support (Yes) 23.0 (23.0) No support (Yes) No support
Feature Android Webview Chrome for Android Firefox Mobile (Gecko) IE Mobile Opera Mobile Safari Mobile
Basic support (Yes) (Yes) 23.0 (23.0) No support (Yes) No support

See also

Document Tags and Contributors

 Contributors to this page: jpmedley, JohnRiv, fscholz, teoli, kscarfone
 Last updated by: jpmedley,