Nodejs Utililty Methods String Camel Case

String.prototype.toCamelCase = function(){
    return this
        .toLowerCase()
        .replace( /\W+/g, ' ' )
        .replace( / (.)/g, function($1) { return $1.toUpperCase(); })
        .replace( / /g, '' );

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

String.prototype.toCamelCase = function () {
  const regex = new RegExp(/(?:_|-)(.)/g)
  if (regex.test(this)) {
    return this.toLowerCase().replace(regex, (match, group1) => {
      return group1.toUpperCase()
    })
  return this + ''

String.prototype.toCamelCase = function () {
    return this
        .replace(/\s(.)/g, function ($1) { return $1.toUpperCase(); })
        .replace(/\s/g, '')
        .replace(/^(.)/, function ($1) { return $1.toLowerCase(); });
function enumString(e,value) 
    for (var k in e) if (e[k] == value) return k;
...

String.prototype.toCamelCase = function () {
  return this.replace(/^\s+|\s+$/g, '')
    .toLowerCase()
    .replace(/([\s\-\_][a-z0-9])/g, function ($1) {
      return $1.replace(/\s/, '').toUpperCase();
    })
    .replace(/\W/g, '');
};
export default String.prototype.toCamelCase;
...

String.prototype.toCamelCase = function () {
  return this.replace(/^\s+|\s+$/g, '').toLowerCase().replace(/([\s\-\_][a-z0-9])/g, function ($1) {
    return $1.replace(/\s/, '').toUpperCase();
  }).replace(/\W/g, '');
};

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.split(/\W+/g).map(function (w) {
        return w.substr(0, 1).toUpperCase() + w.substr(1); 
    }).join(' ');
};

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, function (g) { return g[1].toUpperCase(); });
};