The animationcancel event is fired when a CSS Animation unexpectedly aborts. In other words, any time it stops running without sending an animationend event. This might happen when the animation-name is changed such that the animation is removed, or when the animating node is hidden using CSS. Therefore, either directly or because any of its containing nodes are hidden.

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: animationcancel.

This code adds a listener to the animationcancel event.

window.addEventListener('animationcancel', () => {
  console.log('Animation canceled');
});

The same, but using the onanimationcancel property instead of addEventListener():

window.onanimationcancel = () => {
  console.log('Animation canceled');
};

See a live example of this event.

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