Izmjenjena struktura, dodan backand

web/node_modules/core-js/modules/es6.set.js

@@ -0,0 +1,12 @@
+'use strict';
+var strong = require('./$.collection-strong');
+
+// 23.2 Set Objects
+require('./$.collection')('Set', function(get){
+  return function Set(){ return get(this, arguments.length > 0 ? arguments[0] : undefined); };
+}, {
+  // 23.2.3.1 Set.prototype.add(value)
+  add: function add(value){
+    return strong.def(this, value = value === 0 ? 0 : value, value);
+  }
+}, strong);