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sample/prod/talk/bundle/popper-2.11.8/esm/dom-utils/getScrollParent.js

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+import getParentNode from "./getParentNode.js";
+import isScrollParent from "./isScrollParent.js";
+import getNodeName from "./getNodeName.js";
+import { isHTMLElement } from "./instanceOf.js";
+export default function getScrollParent(node) {
+  if (['html', 'body', '#document'].indexOf(getNodeName(node)) >= 0) {
+    // $FlowFixMe[incompatible-return]: assume body is always available
+    return node.ownerDocument.body;
+  }
+
+  if (isHTMLElement(node) && isScrollParent(node)) {
+    return node;
+  }
+
+  return getScrollParent(getParentNode(node));
+}