Reverse and Omit Non-alphabetic Characters

/*Downloaded from https://www.codeseek.co/izotope115/reverse-and-omit-non-alphabetic-characters-aWWOeK */
    

/*Downloaded from https://www.codeseek.co/izotope115/reverse-and-omit-non-alphabetic-characters-aWWOeK */
    const reverseLetter = str => {
  let replace = str.replace(/[0-9]/g, "").replace(/[^a-zA-Z0-9]/g, "");
  replace = replace.split("").reverse().join("");

  return replace;
};

// reverseLetter("ultr53o?n"); "nortlu"
// using 'let' vs const becase we are re-assigning its value