Nodejs Utililty Methods String Title Case

String.prototype.toTitleCase = function () {
    return this.replace(/\w\S*/g, function(txt){return txt.charAt(0).toUpperCase() + txt.substr(1).toLowerCase();});
};

String.prototype.toTitleCase = function(){
  var smallWords = /^(a|an|and|as|at|but|by|en|for|if|in|nor|of|on|or|per|the|to|vs?\.?|via)$/i;
  return this.replace(/[A-Za-z0-9\u00C0-\u00FF]+[^\s-]*/g, function(match, index, title){
    if (index > 0 && index + match.length !== title.length &&
      match.search(smallWords) > -1 && title.charAt(index - 2) !== ":" &&
      (title.charAt(index + match.length) !== '-' || title.charAt(index - 1) === '-') &&
      title.charAt(index - 1).search(/[^\s-]/) < 0) {
      return match.toLowerCase();
    if (match.substr(1).search(/[A-Z]|\../) > -1) {
      return match;
    return match.charAt(0).toUpperCase() + match.substr(1);
  });
};

String.prototype.toTitleCase = function () {
  if (!this) throw new Error('Null refference extension.');
  if (!this.length) return this;
  var words = this.split(' ');
  if (words.length === 1) 
    return this[0].toUpperCase() + this.substring(1).toLowerCase();
  for (var i = 0; i < words.length; i++) {
    words[i] = words[i].toTitleCase();
  };
...

String.prototype.toTitleCase = function(){
  var smallWords = /^(a|an|and|as|at|but|by|en|for|if|in|nor|of|on|or|per|the|to|vs?\.?|via)$/i;
  return this.toLowerCase().replace(/[A-Za-z0-9\u00C0-\u00FF]+[^\s-]*/g, function(match, index, title){
    if (index > 0 && index + match.length !== title.length &&
      match.search(smallWords) > -1 && title.charAt(index - 2) !== ":" &&
      (title.charAt(index + match.length) !== '-' || title.charAt(index - 1) === '-') &&
      title.charAt(index - 1).search(/[^\s-]/) < 0) {
      return match.toLowerCase();
    if (match.substr(1).search(/[A-Z]|\../) > -1) {
      return match;
    return match.charAt(0).toUpperCase() + match.substr(1);
  });
};

String.prototype.toTitleCase = function() {
    return this.replace(/\w\S*/g, function(txt) {
        if (txt)
            return txt.charAt(0).toUpperCase() + txt.substr(1).toLowerCase();
        else
            return this;
    });

String.prototype.toTitleCase = function() {
  return this.replace(/\w\S*/g, function(txt) {
    return txt.charAt(0).toUpperCase() + txt.substr(1).toLowerCase();
  });
};

String.prototype.toTitleCase = function() {
  return this.replace(/([\w&`'?"?@:\/\{\(\[<>_]+-? *)/g,
  function(match, p1, index, title) {
    if (index > 0 && title.charAt(index - 2) !== ":" && match.search(/^(a(nd?|s|t)?|b(ut|y)|en|for|i[fn]|o[fnr]|t(he|o)|vs?\.?|via)[ \-]/i) > -1) return match.toLowerCase();
    if (title.substring(index - 1, index + 1).search(/['"_{(\[]/) > -1) return match.charAt(0) + match.charAt(1).toUpperCase() + match.substr(2);
    if (match.substr(1).search(/[A-Z]+|&|[\w]+[._][\w]+/) > -1 || title.substring(index - 1, index + 1).search(/[\])}]/) > -1) return match;
    return match.charAt(0).toUpperCase() + match.substr(1);
  });
};
...

String.prototype.toTitleCase = function() {
  var smallWords = /^(a|an|and|as|at|but|by|en|for|if|in|nor|of|on|or|per|the|to|vs?\.?|via)$/i;
  return this.replace(/[A-Za-z0-9\u00C0-\u00FF]+[^\s-]*/g, function(match, index, title){
    if (index > 0 && index + match.length !== title.length &&
      match.search(smallWords) > -1 && title.charAt(index - 2) !== ":" &&
      (title.charAt(index + match.length) !== '-' || title.charAt(index - 1) === '-') &&
      title.charAt(index - 1).search(/[^\s-]/) < 0) {
      return match.toLowerCase();
    if (match.substr(1).search(/[A-Z]|\../) > -1) {
      return match;
    return match.charAt(0).toUpperCase() + match.substr(1);
  });
};

String.prototype.toTitleCase = function() {
    var i, str, lowers, uppers;
    str = this.replace(/([^\W_]+[^\s-]*) */g, function(txt) {
        return txt.charAt(0).toUpperCase() + txt.substr(1).toLowerCase();
    });
    lowers = ['A', 'An', 'The', 'And', 'But', 'Or', 'For', 'Nor', 'As', 'At', 
    'By', 'For', 'From', 'In', 'Into', 'Near', 'Of', 'On', 'Onto', 'To', 'With'];
    for (i = 0; i < lowers.length; i++)
        str = str.replace(new RegExp('\\s' + lowers[i] + '\\s', 'g'), 
...

String.prototype.toTitleCase = function() {
    var i, j, str, lowers, uppers;
    str = this.replace(/([^\W_]+[^\s-]*) */g, function(txt) {
    return txt.charAt(0).toUpperCase() + txt.substr(1).toLowerCase();
    });
    lowers = ['A', 'An', 'The', 'And', 'But', 'Or', 'For', 'Nor', 'As', 'At', 
    'By', 'For', 'From', 'In', 'Into', 'Near', 'Of', 'On', 'Onto', 'To', 'With'];
    for (i = 0, j = lowers.length; i < j; i++)
    str = str.replace(new RegExp('\\s' + lowers[i] + '\\s', 'g'), 
...