Counting number of vowels in a string with JavaScript

Question

I\'m using basic JavaScript to count the number of vowels in a string. The below code works but I would like to have it cleaned up a bit. Would using .includes()

Answer 1

This could also be solved using .replace() method by replacing anything that isn't a vowel with an empty string (basically it will delete those characters) and returning the new string length:

function vowelCount(str) {
  return str.replace(/[^aeiou]/gi, "").length;
};

or if you prefer ES6

const vowelCount = (str) => ( str.replace(/[^aeiou]/gi,"").length )