Discussion on: Daily Challenge #3 - Vowel Counter

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const charCounter = ({strToCount = "", chars = ""} = {}) => {
    const charsToCount = chars.toLowerCase();
    return Array.from(strToCount.toLowerCase())
        .reduce((acc, candidate) => acc += charsToCount.includes(candidate) 
        ? 1 : 0, 0)
}

const countVowels= strToCount => charCounter({strToCount, chars: "aeiou"});

assert(countVowels("The quick brown fox jumps over the lazy dog.") === 11);
assert(countVowels("Hello") === 2);
assert(countVowels("Xyl") === 0);
assert(countVowels("aeiouAEIOU") === 10);