Next Tab Keystroke goes to next input

next-input.js

function nextFocusInput(e) {
  if (e.target.tagName == 'INPUT') {
    return;
  }
  if (!e.relatedTarget || e.relatedTarget.tagName != 'INPUT') {
    return;
  }
  e.preventDefault();
  var allInputs = Array.from(document.querySelectorAll('input'));
  allInputs[allInputs.indexOf(e.relatedTarget) + 1].focus();
}
document.addEventListener('focusin', nextFocusInput);