Codecademy export

main.js

const inputNew = 'bEttEr to rEmain silEnt and thought a fool than to spEak and rEmovE all doubt';
let input = inputNew.toLowerCase();
const vowels = ['a', 'e', 'i', 'o', 'u', ];
let resultArray = [];
for (i = 0; i < input.length; i++) {
  for (j = 0; j < vowels.length; j++){
    if (input[i] === vowels[j]) {
      resultArray.push(input[i].toUpperCase());
    }
  }
   if (input[i] === 'e' || input[i] === 'u') {
    resultArray.push(input[i].toUpperCase());
  } 
}

console.log(resultArray.join(''));