/** * Capitalize function on strings. */ String.prototype.capitalize = function () { return this.charAt(0).toUpperCase() + this.slice(1); }; /** * Strip characters at the end of a string. * * @param chars A regex-like element to strip from the end. */ String.prototype.rstrip = function (chars) { let regex = new RegExp(chars + "$"); return this.replace(regex, ""); };