Document: animationiteration event - Web APIs 编辑

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.

The original target for this event is the Element that had the animation applied. You can listen for this event on the Document 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;

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

The same, but using the onanimationiteration event handler property:

let iterationCount = 0;

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

See a live example of this event.

Specifications

Browser compatibility

BCD tables only load in the browser

See also

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