Web Animations API - Web APIs | MDN
The Web Animations API allows for synchronizing and timing changes to the presentation of a Web page, i.e. animation of DOM elements. It does so by combining two models: the Timing Model and the Animation Model. The Web Animations API provides a common language for browsers and developers to describe animations on DOM elements.
https://developer.mozilla.org/en-US/docs/Web/API/Web_Animations_API