@popperjs/core/dist/esm/dom-utils/getDocumentElement.js

Tooltip and Popover Positioning Engine

import { isElement } from "./instanceOf.js";
export default function getDocumentElement(element) {
  // $FlowFixMe[incompatible-return]: assume body is always available
  return ((isElement(element) ? element.ownerDocument : // $FlowFixMe[prop-missing]
  element.document) || window.document).documentElement;
}