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

Just use this function [for ES5] :

function countVowels(str){
    return (str.match(/[aeiou]/gi) == null) ? 0 : str.match(/[aeiou]/gi).length;        
}

Will work like a charm