js english vowel letters code example

Example 1: javascript replace vowel

function vowel2index(str) {
   return str.replace(/[aeiou]/ig, (m, i) => i + 1);
}

Example 2: find the vowel js

function vowel_count(str1)
{
  var vowel_list = 'aeiouAEIOU';
  var vcount = 0;
  
  for(var x = 0; x < str1.length ; x++)
  {
    if (vowel_list.indexOf(str1[x]) !== -1)
    {
      vcount += 1;
    }
  
  }
  return vcount;
}
console.log(vowel_count("The quick brown fox"));