msdosx86

const link = document.querySelector('.link');
link.addEventListener('click', e => {
  e.preventDefault();
  const inputs = document.querySelectorAll('.data');
  inputs.forEach(input => {
    if (input.value == '') {
      input.style.border = '2px solid red';
    } else {
      input.style.border = '2px solid green';
    }
  })
})