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

One more method (using reduce):

   function getVowels(str) {
     return Array.from(str).reduce((count, letter) => count + 'aeiou'.includes(letter), 0);
   }