How do I check for vowels in JavaScript?

Question

I\'m supposed to write a function that takes a character (i.e. a string of length 1) and returns true if it is a vowel, false otherwise. I came up with two functions, but do

Answer 1

function findVowels(str) {
  return str.match(/[aeiou]/ig);
}

findVowels('abracadabra'); // 'aaaaa'

Basically it returns all the vowels in a given string.