Element: animationend event

The animationend event is fired when a CSS Animation has completed. If the animation aborts before reaching completion, such as if the element is removed from the DOM or the animation is removed from the element, the animationend event is not fired.

Syntax

Use the event name in methods like addEventListener(), or set an event handler property.

addEventListener("animationend", (event) => {});

onanimationend = (event) => {};

Event type

An AnimationEvent. Inherits from Event.

Event properties

Also inherits properties from its parent Event.

AnimationEvent.animationName Read only: A string containing the value of the animation-name that generated the animation.
AnimationEvent.elapsedTime Read only: A float giving the amount of time the animation has been running, in seconds, when this event fired, excluding any time the animation was paused. For an animationstart event, elapsedTime is 0.0 unless there was a negative value for animation-delay, in which case the event will be fired with elapsedTime containing (-1 * delay).
AnimationEvent.pseudoElement Read only: A string, starting with '::', containing the name of the pseudo-element the animation runs on. If the animation doesn't run on a pseudo-element but on the element, an empty string: ''.

Examples

This example gets an element that's being animated and listens for the animationend event:

const animated = document.querySelector(".animated");

animated.addEventListener("animationend", () => {
  console.log("Animation ended");
});

The same, but using the onanimationend event handler property:

const animated = document.querySelector(".animated");

animated.onanimationend = () => {
  console.log("Animation ended");
};

Live example

HTML

html

<div class="animation-example">
  <div class="container">
    <p class="animation">You chose a cold night to visit our planet.</p>
  </div>
  <button class="activate" type="button">Activate animation</button>
  <div class="event-log"></div>
</div>

CSS

css

.container {
  height: 3rem;
}

.event-log {
  width: 25rem;
  height: 2rem;
  border: 1px solid black;
  margin: 0.2rem;
  padding: 0.2rem;
}

.animation.active {
  animation-duration: 2s;
  animation-name: slidein;
  animation-iteration-count: 2;
}

@keyframes slidein {
  from {
    margin-left: 100%;
    width: 300%;
  }

  to {
    margin-left: 0%;
    width: 100%;
  }
}

JavaScript

const animation = document.querySelector("p.animation");
const animationEventLog = document.querySelector(
  ".animation-example>.event-log"
);
const applyAnimation = document.querySelector(
  ".animation-example>button.activate"
);
let iterationCount = 0;

animation.addEventListener("animationstart", () => {
  animationEventLog.textContent = `${animationEventLog.textContent}'animation started' `;
});

animation.addEventListener("animationiteration", () => {
  iterationCount++;
  animationEventLog.textContent = `${animationEventLog.textContent}'animation iterations: ${iterationCount}' `;
});

animation.addEventListener("animationend", () => {
  animationEventLog.textContent = `${animationEventLog.textContent}'animation ended'`;
  animation.classList.remove("active");
  applyAnimation.textContent = "Activate animation";
});

animation.addEventListener("animationcancel", () => {
  animationEventLog.textContent = `${animationEventLog.textContent}'animation canceled'`;
});

applyAnimation.addEventListener("click", () => {
  animation.classList.toggle("active");
  animationEventLog.textContent = "";
  iterationCount = 0;
  const active = animation.classList.contains("active");
  applyAnimation.textContent = active
    ? "Cancel animation"
    : "Activate animation";
});

Result

Specifications

Specification
CSS Animations Level 1 # eventdef-globaleventhandlers-animationend

Browser compatibility

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