Configring node js.

node_modules/core-js/library/modules/es7.string.pad-end.js

@@ -0,0 +1,10 @@
+'use strict';
+// https://github.com/tc39/proposal-string-pad-start-end
+var $export = require('./_export')
+  , $pad    = require('./_string-pad');
+
+$export($export.P, 'String', {
+  padEnd: function padEnd(maxLength /*, fillString = ' ' */){
+    return $pad(this, maxLength, arguments.length > 1 ? arguments[1] : undefined, false);
+  }
+});