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

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() {
  endingUI.style.pointerEvents = 'auto';


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

Browser compatibility

FeatureChromeEdgeFirefoxInternet ExplorerOperaSafari
Basic support39 ?


42 — 481

No26 No
FeatureAndroid webviewChrome for AndroidEdge mobileFirefox for AndroidOpera AndroidiOS SafariSamsung Internet
Basic support3939 ?


42 — 481

26 No4.0

1. From version 42 until version 48 (exclusive): this feature is behind the dom.animations-api.core.enabled preference (needs to be set to true). To change preferences in Firefox, visit about:config.

See also

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