Izmjenjena struktura, dodan backand

web/node_modules/core-js/modules/$.string-repeat.js

@@ -0,0 +1,12 @@
+'use strict';
+var toInteger = require('./$.to-integer')
+  , defined   = require('./$.defined');
+
+module.exports = function repeat(count){
+  var str = String(defined(this))
+    , res = ''
+    , n   = toInteger(count);
+  if(n < 0 || n == Infinity)throw RangeError("Count can't be negative");
+  for(;n > 0; (n >>>= 1) && (str += str))if(n & 1)res += str;
+  return res;
+};