1 var makeString = require('./helper/makeString');
2 var defaultToWhiteSpace = require('./helper/defaultToWhiteSpace');
3 var nativeTrimRight = String.prototype.trimRight;
5 module.exports = function rtrim(str, characters) {
7 if (!characters && nativeTrimRight) return nativeTrimRight.call(str);
8 characters = defaultToWhiteSpace(characters);
9 return str.replace(new RegExp(characters + '+$'), '');