@material-ui/popper.js/src/utils/getWindow.js

A fork of popper.js to avoid the deprecation warnings: https://github.com/mui-org/material-ui/issues/19358.

/**
 * Get the window associated with the element
 * @argument {Element} element
 * @returns {Window}
 */
export default function getWindow(element) {
  const ownerDocument = element.ownerDocument;
  return ownerDocument ? ownerDocument.defaultView : window;
}