Nodejs Utililty Methods String Capitalize

String.prototype.capitalize = function () {
  var fl = this.charCodeAt(0);
  if (fl > 96 && fl < 123) fl -= 32
  String.fromCharCode(fl) + this.slice(1);

String.prototype.capitalize = function(){
    return this.charAt(0).toUpperCase() + this.slice(1);

String.prototype.capitalize = function() {
  return this.charAt(0).toUpperCase() + this.substring(1);

String.prototype.capitalize = function() {
    return this.replace(/_/, ' ').replace(/(?:^|\s)\S/g, function(a) { return a.toUpperCase(); });
};

String.prototype.capitalize = function()
  return this.charAt(0).toUpperCase() + this.slice(1);

String.prototype.capitalize=function() {
    return this[0].toUpperCase()+this.substring(1, this.length);    
};

String.prototype.capitalize = function () {
  const charArray = this.toLowerCase().split('')
  charArray[0] = charArray[0].toUpperCase()
  return charArray.join('')

String.prototype.capitalize = String.prototype.capitalize || function(){
  var split = this.split(' ').filter(Boolean);
  var len = split.length;
  var capitalized_string = '';
  for (var i=0;i<len;i++) {
    capitalized_string = capitalized_string + split[i].charAt(0).toUpperCase() + split[i].slice(1).toLowerCase() + " ";
  return capitalized_string.slice(0, capitalized_string.length-1);

String.prototype.capitalize = function () {
    return this.toLowerCase().replace(/(^|\s)([a-z])/g, function (m, p1, p2) {
        return p1 + p2.toUpperCase();
    });
}; 

String.prototype.capitalize = function() {
  var newString = "";
  for (var i = 0; i < this.length; i++) {
    if (i === 0 || this.charAt(i - 1) === " ") {
      newString += this.charAt(i).toUpperCase();
    } else {
      newString += this.charAt(i);
  return newString;
};