Installed some nugets

MVCUI/Scripts/src/utils/getStyleComputedProperty.js

@@ -0,0 +1,16 @@
+/**
+ * Get CSS computed property of the given element
+ * @method
+ * @memberof Popper.Utils
+ * @argument {Eement} element
+ * @argument {String} property
+ */
+export default function getStyleComputedProperty(element, property) {
+  if (element.nodeType !== 1) {
+    return [];
+  }
+  // NOTE: 1 DOM access here
+  const window = element.ownerDocument.defaultView;
+  const css = window.getComputedStyle(element, null);
+  return property ? css[property] : css;
+}