Animation.onfinish - Web APIs 编辑

Experimental

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).

Syntax

var finishHandler = Animation.onfinish;

Animation.onfinish = finishHandler;

Value

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

Examples

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
bringUI.pause();

// This function removes pointer events on the credits.
hide(endingUI);

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

Specifications

Browser compatibility

BCD tables only load in the browser

See also

• Web Animations API
• Animation
• Animation.finish()