feat: add new file

frontend/node_modules/dom-helpers/esm/getComputedStyle.js

@@ -0,0 +1,11 @@
+import ownerWindow from './ownerWindow';
+/**
+ * Returns one or all computed style properties of an element.
+ * 
+ * @param node the element
+ * @param psuedoElement the style property
+ */
+
+export default function getComputedStyle(node, psuedoElement) {
+  return ownerWindow(node).getComputedStyle(node, psuedoElement);
+}