Implementation of the function to trim the string object

trim.js

//trim completo
String.prototype.trim = function () {
  return this.replace(/^\s+|\s+$/g,"");
}

//left trim
String.prototype.ltrim = function () {
  return this.replace(/^\s+/,"");
}

//right trim
String.prototype.rtrim = function () {
  return this.replace(/\s+$/,"");
}