CSSTransition

Baseline Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since September 2015.

The CSSTransition interface of the Web Animations API represents an Animation object used for a CSS Transition.

Instance properties

This interface inherits properties from its parent, Animation.

CSSTransition.transitionProperty Read only: Returns the transition CSS property name as a string.

Instance methods

This interface inherits methods from its parent, Animation.

No specific methods.

The transition in the following example changes the width of the box on hover. Calling Element.getAnimations() returns an array of all Animation objects. In our case this returns a CSSTransition object, representing the animation created.

css

.box {
  background-color: #165baa;
  color: #fff;
  width: 100px;
  height: 100px;
  transition: width 4s;
}

.box:hover {
  width: 200px;
}

const item = document.querySelector(".box");
item.addEventListener("transitionrun", () => {
  let animations = document.querySelector(".box").getAnimations();
  console.log(animations[0]);
});

Specifications

Specification
CSS Transitions Level 2 # the-CSSTransition-interface

Browser compatibility

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