Here you can find the source of cleanTitle()
/**//from w w w . j a va 2 s . co m * Clean up string. */ String.prototype.cleanTitle = function() { var title = this.trim().replaceHtmlEntites(); title = encodeURI(title); return title.replace(/&/g, '%26').replace(/#/g, '%23'); };
String.prototype.title = function() { return this.replace(/\w\S*/g, function(txt) { return txt.charAt(0).toUpperCase() + txt.substr(1).toLowerCase(); }); };
String.prototype.title = function() { return this.charAt(0).toUpperCase() + this.slice(1); }; module.exports = String;
String.prototype.titleCase = function () { return this.replace(/\w\S*/g, (txt) => { return txt.charAt(0).toUpperCase() + txt.substr(1).toLowerCase(); }); };
String.prototype.titleCase= function() return this.charAt(0).toUpperCase() + this.substr(1);