Find vowels in JavaScript

vowels.js

//specs
vowels('Hello World!') //3
vowels('My name is javascript') //6

//solution 1
function vowels(str) {
  const vowelChar = ['a', 'e', 'i', 'o', 'u'];

  let count = 0;
  for (let char of str.toLowerCase()) {
    if (vowelChar.includes(char)) {
      count++;
    }
  }
  return count;
}

// solution 2
function vowels(str) {
  const matches = str.match(/[aeiou]/gi)
  return matches ? matches.length : 0
}