Function countVowels

String/CountVowels.js:10–19

(str)

 */

const countVowels = (str) => {
  if (typeof str !== 'string') {
    throw new TypeError('Input should be a string')
  }

  const vowelRegex = /[aeiou]/gi
  const vowelsArray = str.match(vowelRegex) || []

  return vowelsArray.length
}

export { countVowels }