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