Nodejs Utililty Methods String Title Case

String.prototype.titlecase = function () {
  const wordArray = this.split(' ')
  const restrictedWords = ['a', 'the', 'an', 'and']
  const newWordArray = wordArray.map(word => {
    const downcaseWord = word.toLowerCase()
    if(restrictedWords.includes(downcaseWord)) return downcaseWord
    return word.capitalize()
  })
  newWordArray[0] = newWordArray[0].capitalize()
...

String.prototype.titleize = function(){
  if(this.length == 0) return this;
  return this[0].toUpperCase() + this.substr(1).toLowerCase();

String.prototype.titleize = function() {
  var words = this.split(' ')
  var array = []
  for (var i=0; i<words.length; ++i) {
    array.push(words[i].charAt(0).toUpperCase() + words[i].toLowerCase().slice(1))
  return array.join(' ')

String.prototype.titleize = function() {
  var res = [];
  var parts = this.split(/_| /);
  $.each(parts, function(index, part) {
    res.push(part.capitalize());
  });
  return res.join(" ");
};

String.prototype.titleize = function() {
    var string_array = this.split(/[_-]+/);
    string_array = string_array.map(function(str) {
        return str.capitalize();
    });
    return string_array.join(' ');

String.prototype.titleize = function() {
  var out = this;
  out = out.replace(/^\s*/, "");  
  out = out.replace(/_/g, ' ');
  out = out.replace(/^[a-z]|[^\s][A-Z]/g, function(str, offset) {
    if (offset === 0) {
      return(str.toUpperCase());
    } else {
      return(str.substr(0,1) + " " + str.substr(1).toUpperCase());
...

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

String.prototype.titleize = function() {
  strings = this.split(' ')
  string  = ''
  for (var i = 0, len = strings.length; i < len; ++i) {
    string += strings[i].charAt(0).toUpperCase() + strings[i].toLowerCase().slice(1)
    if (i != (len-1)) { string += ' ' }
  return string
function switchPage(page) {
    var links = ['home', 'add', 'import'];
    for (var i=0;i<links.length;i++) {
        var link = document.getElementById(links[i] + '-bar');
        link.className = "";
        if (links[i] == page)
            link.className = "active";

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

String.prototype.titleize = function() {
  words = this.split(' ');
  for(i in words)
    words[i] = words[i].capitalize();
  return words.join(' ');