Izmjenjena struktura, dodan backand

web/node_modules/core-js/modules/$.is-regexp.js

@@ -0,0 +1,8 @@
+// 7.2.8 IsRegExp(argument)
+var isObject = require('./$.is-object')
+  , cof      = require('./$.cof')
+  , MATCH    = require('./$.wks')('match');
+module.exports = function(it){
+  var isRegExp;
+  return isObject(it) && ((isRegExp = it[MATCH]) !== undefined ? !!isRegExp : cof(it) == 'RegExp');
+};