Nodejs Utililty Methods String Trim

var trim = function (str) {
    return str.replace(/\s*/g, "");
};

String.prototype.trim = function (ws)
    if(!this.length) return "";
    var tmp = this.stripNL().ltrim().rtrim();
    if(ws) return tmp.replace(/ +/g, ' ');
    else return tmp;
String.prototype.rtrim = function ()
    if(!this.length) return "";
    return this.replace(/\s+$/g, '');
String.prototype.ltrim = function ()
    if(!this.length) return "";
    return this.replace(/^\s+/g, '');
String.prototype.stripNL = function ()
    if(!this.length) return "";
    return this.replace(/[\n\r]/g, '');

String.prototype.trim2 = function() {
  return this.replace(/^\s+|\s+$/g, '');
};
String.prototype.trim = function() {
  return this.replace(/^\s+/, '').replace(/\s+$/, '');
};
'foo     '.trim(); 
'     foo'.trim(); 
'  foo   '.trim(); 
...

String.prototype.trimBoth = function(s) {
    return this.replace(new RegExp("^" + s + "+|" + s + "+$", "gm"), "");

String.prototype.trimChars = function(charlist) {
  charlist = charlist || ' \r\n\t';
    var l = 0, i = 0;
    var ret = this;
    l = ret.length;
    for (i = 0; i < l; i++) {
        if (charlist.indexOf(ret.charAt(i)) === -1) {
            ret = ret.substring(i);
            break;
...

String.prototype.trimSlash = function () {
    var string = this.trim();
    if (string.charAt(0) == "/") {
        string = string.substring(1);
    if (string.charAt(string.length - 1) == "/") {
        string = string.substring(0, string.length - 1);
    return string;
...

'use strict';
String.prototype.trimSpace = function() {
    var s = this;
    var n = s.length - 1;
    while (n >= 0 && s.charCodeAt(n) == 32) {
        n--;
    return n >= 0 ? s.substr(0, n + 1) : "";
};
...

String.prototype.trimSpaces = function () {
  var phrases = this.split(" ");
  var result = "";
  for (var i = 0; i < phrases.length; i++) {
    if (!phrases[i]=="") {
      if (result=="") {
        result = phrases[i];
      } else {
        result += " " + phrases[i];
...

String.prototype.trimStart=function(c)
    c = c?c:' ';
    var i=0;
    for(;i<this.length && this.charAt(i)==c; i++);
    return this.substring(i);

String.prototype.trimStart = function(s) {
    return this.replace(new RegExp("^" + s + "+", "gm"), "");