num-of-vowels.js

// Return the number (count) of vowels in the given string.
// We will consider a, e, i, o, and u as vowels for this Kata.
// The input string will only consist of lower case letters and/or spaces.

function getCount(str) {
    const strArr = str.split("")
    let vowelsArr = []
    strArr.forEach(function(letter) {
        if (checkLetters(letter)) {
            vowelsArr.push(letter)
        }
    })
    vowelsArr = vowelsArr.length 
    return vowelsArr
}

function checkLetters(letter) {
    const vowels = ['a','e','i','o','u']
    let i = 0
    while (i < vowels.length) {
        if (vowels[i] === letter) {
            return true
        }
        i++  
    }
}