Use arrow keys to scroll through the input history in Amazon's Alexa simulator

history.js

(function() {
  let i = 0;
  const el = document.querySelector('.askt-utterance__input');
  el.addEventListener('keyup', function(ev) {
    const req = document.querySelectorAll('.askt-dialog__message--request');
    if (ev.key == 'ArrowUp') i = i >= req.length - 1 ? 0 : i + 1;
    else if (ev.key == 'ArrowDown') i = i > 0 ? i - 1 : req.length - 1;
    else return;
    el.value = '';
    document.execCommand('insertText', false, req[i].innerText);
  });
}());