Izmjenjena struktura, dodan backand

web/node_modules/core-js/modules/$.iter-create.js

@@ -0,0 +1,13 @@
+'use strict';
+var $              = require('./$')
+  , descriptor     = require('./$.property-desc')
+  , setToStringTag = require('./$.set-to-string-tag')
+  , IteratorPrototype = {};
+
+// 25.1.2.1.1 %IteratorPrototype%[@@iterator]()
+require('./$.hide')(IteratorPrototype, require('./$.wks')('iterator'), function(){ return this; });
+
+module.exports = function(Constructor, NAME, next){
+  Constructor.prototype = $.create(IteratorPrototype, {next: descriptor(1, next)});
+  setToStringTag(Constructor, NAME + ' Iterator');
+};