анимация расширения блока

export default (el, duration = 2000, delay = 0) => {
  window.setTimeout(() => {
    el.style.height = 0;
    el.style.transition = `height ${duration}ms ease-in-out`;
    el.style.overflow = 'hidden';
    window.setTimeout(() => {
      el.style.height = el.scrollHeight + 'px';
    }, 100);
    window.setTimeout(() => {
      el.style.height = 'auto';
      el.style.transition = '';
    }, duration);
  }, delay);
};