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

You can use the simple includes function, which returns true if the given array contains the given character, and false if not.

Note: The includes() method is case sensitive. So before comparing a character convert it to lowercase to avoid missing all the possible cases.

for (var i = 0; i <= string.length - 1; i++) {
  if ('aeiou'.includes(string[i].toLowerCase())) {
    vowelsCount += 1;
  }
}