Izmjenjena struktura, dodan backand

web/node_modules/core-js/modules/es7.string.pad-left.js

@@ -0,0 +1,9 @@
+'use strict';
+var $export = require('./$.export')
+  , $pad    = require('./$.string-pad');
+
+$export($export.P, 'String', {
+  padLeft: function padLeft(maxLength /*, fillString = ' ' */){
+    return $pad(this, maxLength, arguments.length > 1 ? arguments[1] : undefined, true);
+  }
+});