Izmjenjena struktura, dodan backand

web/node_modules/regenerator-runtime/runtime-module.js

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+// This method of obtaining a reference to the global object needs to be
+// kept identical to the way it is obtained in runtime.js
+var g =
+  typeof global === "object" ? global :
+  typeof window === "object" ? window :
+  typeof self === "object" ? self : this;
+
+// Use `getOwnPropertyNames` because not all browsers support calling
+// `hasOwnProperty` on the global `self` object in a worker. See #183.
+var hadRuntime = g.regeneratorRuntime &&
+  Object.getOwnPropertyNames(g).indexOf("regeneratorRuntime") >= 0;
+
+// Save the old regeneratorRuntime in case it needs to be restored later.
+var oldRuntime = hadRuntime && g.regeneratorRuntime;
+
+// Force reevalutation of runtime.js.
+g.regeneratorRuntime = undefined;
+
+module.exports = require("./runtime");
+
+if (hadRuntime) {
+  // Restore the original runtime.
+  g.regeneratorRuntime = oldRuntime;
+} else {
+  // Remove the global property added by runtime.js.
+  try {
+    delete g.regeneratorRuntime;
+  } catch(e) {
+    g.regeneratorRuntime = undefined;
+  }
+}