Nodejs Utililty Methods String Trimming Right

String.prototype.trimEnd = function(s) {
    return this.replace(new RegExp(s + "+$", "gm"), "")

String.prototype.trimEnd = function (trimStr) {
    if (!trimStr) {
        return this;
    var temp = this;
    while (true) {
        if (temp.substr(temp.length - trimStr.length, trimStr.length) != trimStr) {
            break;
        temp = temp.substr(0, temp.length - trimStr.length);
    return temp;

String.prototype.trimRight = String.prototype.trimRight || function() {
  return this.replace(/\s+$/,'');
};

String.prototype.trimRight = String.prototype.trimRight || function () {
    return this.replace(/\s+$/g, "");
};
String.prototype.trimLeft = String.prototype.trimLeft || function () {
    return this.replace(/^\s+/g, "");
};
String.prototype.endsWith = String.prototype.endsWith || function(suffix) {
    return this.length ? this.lastIndexOf(suffix) === this.length - 1 : false;
};
...

String.prototype.trimRight = function (character) {
  character = character || ' ';
  return this.replace(new RegExp('[' + character + ']+$'), "");
};

String.prototype.trimRight = function(charlist) {
    "use strict";
    if (charlist === undefined)
        charlist = "\s";
    return this.replace(new RegExp("[" + charlist + "]+$"), "");
};

if (!String.prototype.trimRight)
String.prototype.trimRight = function trimRight() {
  return this.replace(/(?:\s|\u00A0)+$/, '');
};

String.prototype.rightTrim = function () {
    return this.replace(/\s+$/, "");

String.prototype.rightTrim=function(){
    return this.replace(/\s+$/,'');

String.prototype.TrimEnd = function( aimStr )
    var str = this;
    var re = My.RegExp.InvolvedCharsRegExp;
    var reEnd;
    if ( aimStr )
        aimStr = aimStr.replace( re, '\\$1' );
        reEnd = new RegExp( '(' + aimStr + ')+$' );
...