FezVrasta/popper.js

import type {FocusableElement} from 'tabbable';

interface Options {
  preventScroll?: boolean;
  cancelPrevious?: boolean;
  sync?: boolean;
}

let rafId = 0;
export function enqueueFocus(
  el: FocusableElement | null,
  options: Options = {},
) {
  const {preventScroll = false, cancelPrevious = true, sync = false} = options;
  cancelPrevious && cancelAnimationFrame(rafId);
  const exec = () => el?.focus({preventScroll});
  if (sync) {
    exec();
  } else {
    rafId = requestAnimationFrame(exec);
  }
}