Function getActiveElement

packages/react-dom-bindings/src/client/getActiveElement.js:10–20

(doc: ?Document)

 */

export default function getActiveElement(doc: ?Document): ?Element {
  doc = doc || (typeof document !== 'undefined' ? document : undefined);
  if (typeof doc === 'undefined') {
    return null;
  }
  try {
    return doc.activeElement || doc.body;
  } catch (e) {
    return doc.body;
  }
}