Initial commit

wwwroot/lib/popper.js/esm/dom-utils/getWindow.js

@@ -0,0 +1,12 @@
+export default function getWindow(node) {
+  if (node == null) {
+    return window;
+  }
+
+  if (node.toString() !== '[object Window]') {
+    var ownerDocument = node.ownerDocument;
+    return ownerDocument ? ownerDocument.defaultView || window : window;
+  }
+
+  return node;
+}