--- /dev/null
+var makeString = require('./helper/makeString');
+var defaultToWhiteSpace = require('./helper/defaultToWhiteSpace');
+var nativeTrimRight = String.prototype.trimRight;
+
+module.exports = function rtrim(str, characters) {
+ str = makeString(str);
+ if (!characters && nativeTrimRight) return nativeTrimRight.call(str);
+ characters = defaultToWhiteSpace(characters);
+ return str.replace(new RegExp(characters + '+$'), '');
+};