Window: animationiteration event

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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

Update compatibility data on GitHub
DesktopMobile
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidFirefox for AndroidOpera for AndroidSafari on iOSSamsung Internet
animationiteration eventChrome Full support 43
Full support 43
Full support 1
Prefixed
Prefixed Implemented with the vendor prefix: webkit
Edge ? Firefox Full support 51IE ? Opera ? Safari ? 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 51Opera Android ? Safari iOS ? Samsung Internet Android ?

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