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This is an experimental technology
Because this technology's specification has not stabilized, check the compatibility table for usage in various browsers. Also note that the syntax and behavior of an experimental technology is subject to change in future versions of browsers as the specification changes.

The Animation interface's onfinish property (from the Web Animations API) is the event handler for the finish event. This event is sent when the animation finishes playing.

The finish event occurs when the animation completes naturally, as well as when the Animation.finish() method is called to immediately cause the animation to finish up.

The "paused" play state supersedes the "finished" play state; if the animation is both paused and finished, the "paused" state is the one that will be reported. You can force the animation into the "finished" state by setting its startTime to document.timeline.currentTime - (Animation.currentTime * Animation.playbackRate).


var finishHandler = Animation.onfinish;

Animation.onfinish = finishHandler;


A function to be called to handle the finish event, or null if no finish event handler is set.


Animation.onfinish is used several times in the Alice in Web Animations API Land Growing/Shrinking Alice Game. Here is one instance where we add pointer events back to an element after its opacity animation has faded it in:

// Add an animation to the game's ending credits
var endingUI = document.getElementById("ending-ui");
var bringUI = endingUI.animate(keysFade, timingFade);

// Pause said animation's credits

// This function removes pointer events on the credits.

// When the credits are later faded in, 
// we re-add the pointer events when they're done
bringUI.onfinish = function() { = 'auto';


Specification Status Comment
Web Animations
The definition of 'Animation.onfinish' in that specification.
Working Draft Editor's draft.

Browser compatibility

Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari (WebKit)
Basic support 39.0 48 (48)[1] No support No support No support
Feature Android Firefox Mobile (Gecko) IE Phone Opera Mobile Safari Mobile
Basic support (Yes) 48.0 (48)[1] No support No support No support

[1]  The Web Animations API is only enabled by default in Firefox Developer Edition and Nightly builds. You can enable it in beta and release builds by setting the preference dom.animations-api.core.enabled to true, and can disable it in any Firefox version by setting this preference to false.

See also

Document Tags and Contributors

 Contributors to this page: Sheppy, birtles, chrisdavidmills, rachelnabors
 Last updated by: Sheppy,