The target property of a KeyframeEffect interface represents the element or pseudo-element being animated. It may be null for animations that do not target a specific element. It performs as both a getter and a setter, except with animations and transitions generated by CSS.

An Element or null.

In the Follow the White Rabbit example, whiteRabbit sets the target element to be animated:

const whiteRabbit = document.getElementById("rabbit");

const rabbitDownKeyframes = new KeyframeEffect(
  whiteRabbit,
  [{ transform: "translateY(0%)" }, { transform: "translateY(100%)" }],
  { duration: 3000, fill: "forwards" },
);

// returns <div id="rabbit">Click the rabbit's ears!</div>
rabbitDownKeyframes.target;

• Web Animations API
• Property of KeyframeEffect objects.