/**
 * Call `done` once the CSS animations currently running on `el` (or inside
 * it) have finished — or right away when none play: `prefers-reduced-motion`
 * (the stylesheet sets `animation: none`), a host without the tokens
 * stylesheet, or a DOM without the Web Animations API (happy-dom). Add the
 * `--leaving` class BEFORE calling this so the exit keyframes are the ones
 * being waited on.
 */
export declare function afterExit(el: Element, done: () => void): void;