find vowel & consonants in a string java script

function getCount(str) {
let vowelList = 'AEIOUaeiou'
let vowelsCount = 0;

 for(var i = 0; i < str.length ; i++)
  {
    if (vowelList.indexOf(str[i]) !== -1)
    {
      vowelsCount += 1;
    }
  }
  return vowelsCount;
}

const str = "The quick brown fox jumps over a lazy dog"; 
const vowels = str.match(/[aeiou]/gi); 
const consonants = str.match(/[^aeiou]/gi);   
vowels.concat([''],consonants).forEach(k => { console.log(k); } );

// BEST and FASTER implementation using regex
const countVowels = (str) => (str.match(/[aeiou]/gi) || []).length