Nodejs Utililty Methods String Camel Case

String.prototype.toCamelCase = function(){
  return this
         .toLowerCase()
         .replace(/(\s+[a-z])/g, 
            function($1) {
              return $1.toUpperCase().replace(' ', '');
          );

String.prototype.toCamelCase = function () {
    return this.replace(/(?:^\w|[A-Z]|\b\w|\s+)/g, function (match, index) {
        if (+match === 0) return ""; 
        return index == 0 ? match.toLowerCase() : match.toUpperCase();
    });
};

String.prototype.toCamelCase = function() {
    var parts = this.split('-'),
        rtr = "",
        part;
    for (var i = 0; i < parts.length; i++) {
        part = parts[i];
        rtr += (i === 0) ? part.toLowerCase() : part[0].toUpperCase()+part.slice(1).toLowerCase();
    return rtr;
...

String.prototype.toCamelCase = function() {
  return this.replace(/-([a-z])/g, function (m, w) {
    return w.toUpperCase();
  });

String.prototype.toCamelCase = function() {
  return this.replace(/(^|\s)[a-z]/g, function (x) { return x.toUpperCase() });

String.prototype.toCamelCase = function() {
    return this.toLowerCase()
        .replace(/[-_]+/g, ' ')
        .replace(/[^\w\s]/g, '')
        .replace(/ (.)/g, function($1) {
            return $1.toUpperCase();
        })
        .replace(/ /g, '');
};
...

String.prototype.toCamelCase = function () {
    return this.charAt(0).toLowerCase() + this.slice(1);
};

String.prototype.toCamelCase = function() {
  words = this.split(' ')
  var upperCased = '';
  for (var i = 0; i < words.length; i++) {
    for (var y = 0; y < words[i].length; y++) {
      if (y == 0) {
        upperCased += words[i][y].toUpperCase();
      else {
...

String.prototype.toCamelCase = function(){
    return this.replace(/(\_[a-z])/g, function($1){return $1.toUpperCase().replace('_','');});
};

String.prototype.toCamelCase = function() {
  return this
          .replace(/([\-_\.][a-z])/g, ($1) => {
            return $1.toUpperCase().replace('-','');
          });
};