Function tabbable

src/helpers/tabbable.js:70–75

(element)

}

function tabbable(element) {
  let tabIndex = element.getAttribute("tabindex");
  if (tabIndex === null) tabIndex = undefined;
  const isTabIndexNaN = isNaN(tabIndex);
  return (isTabIndexNaN || tabIndex >= 0) && focusable(element, !isTabIndexNaN);
}

export default function findTabbableDescendants(element) {
  const descendants = [].slice