Izmjenjena struktura, dodan backand

web/node_modules/react-dom/lib/ViewportMetrics.js

@@ -0,0 +1,22 @@
+/**
+ * Copyright (c) 2013-present, Facebook, Inc.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ */
+
+'use strict';
+
+var ViewportMetrics = {
+  currentScrollLeft: 0,
+
+  currentScrollTop: 0,
+
+  refreshScrollValues: function (scrollPosition) {
+    ViewportMetrics.currentScrollLeft = scrollPosition.x;
+    ViewportMetrics.currentScrollTop = scrollPosition.y;
+  }
+};
+
+module.exports = ViewportMetrics;