Nodejs Utililty Methods String Trim Left

String.prototype.ltrim = function(){
    var res = this;
    while (res.substring(0, 1) == " ") {
        res = res.substring(1, res.length);
    return res;

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

String.prototype.ltrim = function(ch) {
    var r = new RegExp("^{0}+".format(ch || "\\s"));
    return this.replace(r, "");
};

String.prototype.ltrim = function (charlist) {
  charlist = !charlist ? ' \\s\u00A0' : (charlist + '').replace(/([\[\]\(\)\.\?\/\*\{\}\+\$\^\:])/g, '$1');
  var re = new RegExp('[' + charlist + ']+$', 'g');
  return this.replace(re, '');
};

String.prototype.trimLeft = function() {
  return this.replace(/^\s+/, '');  
};

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

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

String.prototype.trimLeft = function(charlist = '\s') {
    return this.replace(new RegExp('^[' + charlist + ']+'), '');
};

String.prototype.lTrim = function()
    return this.replace(/(^[\\s]*)/g, "");

String.prototype.lTrim = function(){
  str = this;
   var i;
    for(i=0;i<str.length;i++)
        if(str.charAt(i)!=" "&&str.charAt(i)!=" ")break;
    str=str.substring(i,str.length);
    return str;
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