ucwords in JavaScript - Equivalent to PHP's ucwords() Returns a string with the first letter in upper case of each word.

ucwords.js

String.prototype.ucwords = function() {
  str = this.toLowerCase();
  return str.replace(/(^([a-zA-Z\p{M}]))|([ -][a-zA-Z\p{M}])/g,
  	function(s){
  	  return s.toUpperCase();
	});
};