Web/API/Window/animationiteration event

The animationiteration event is fired when an iteration of a CSS Animation ends, and another one begins. This event does not occur at the same time as the animationend event, and therefore does not occur for animations with an animation-iteration-count of one.

Bubbles	Yes
Cancelable	No
Interface	AnimationEvent
Event handler property	onanimationiteration

The original target for this event is the Element that had the animation applied. You can listen for this event on the Window interface to handle it in the capture or bubbling phases. For full details on this event please see the page on HTMLElement: animationiteration.

Examples

This code uses animationiteration to keep track of the number of iterations an animation has completed:

let iterationCount = 0;

window.addEventListener('animationiteration', () => {
  iterationCount++;
  console.log(`Animation iteration count: ${iterationCount}`);
});

The same, but using the onanimationiteration event handler property:

let iterationCount = 0;

window.onanimationiteration = () => {
  iterationCount++;
  console.log(`Animation iteration count: ${iterationCount}`);
};

See a live example of this event.

Specifications

Specification	Status	Comment
CSS Animations	Working Draft	Initial definition

Browser compatibility

The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.

Update compatibility data on GitHub

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
animationiteration event	Chrome Full support 43 Full support 43 Full support 1 Prefixed' Prefixed' Implemented with the vendor prefix: webkit	Edge Full support ≤79 Full support ≤79 Full support ≤79 Prefixed' Prefixed' Implemented with the vendor prefix: webkit	Firefox Full support 51	IE ?	Opera ?	Safari Full support 9	WebView Android Full support 43 Full support 43 Full support Yes Prefixed' Prefixed' Implemented with the vendor prefix: webkit	Chrome Android Full support 43 Full support 43 Full support 18 Prefixed' Prefixed' Implemented with the vendor prefix: webkit	Firefox Android Full support 51	Opera Android ?	Safari iOS Full support 9	Samsung Internet Android Full support 4.0 Full support 4.0 Full support 1.0 Prefixed' Prefixed' Implemented with the vendor prefix: webkit

Legend

Full support  

Full support

Compatibility unknown  

Compatibility unknown

Requires a vendor prefix or different name for use.'

Requires a vendor prefix or different name for use.

See also

• CSS Animations
• Using CSS Animations
• AnimationEvent
• Related events: animationstart, animationend, animationcancel
• This event on Document targets: animationiteration
• This event on HTMLElement targets: animationiteration

Window: animationiteration event by Mozilla Contributors is licensed under CC-BY-SA 2.5.