Zooniverse Zoo-Keeper Shortcuts.

zookeeper-shortcuts.js

function addHints() {
  document.querySelectorAll('label.answer p').forEach((p, i) => {
    if (p.getAttribute('data-processed')) return;
    let hint = document.createTextNode(` (SHIFT: ${i + 1})`);
    p.appendChild(hint); 
    p.setAttribute('data-processed', 'true');
  });
}
setInterval(addHints, 1000);
window.addEventListener('keydown', (k) => {
  if (!k.shiftKey) return;
  if (k.code.indexOf('Digit') === 0) {    
    /* Actually select an option. */
    let numeral = k.keyCode - 48;
    document.querySelector(`label.answer:nth-child(${numeral}) input`).click();  
    setTimeout(() => {
      let buttons = document.querySelectorAll('nav.task-nav button');
      if (!buttons.length) return;
      buttons[buttons.length - 1].focus();
    }, 100);
  } else {
    /* Else display options */
    adddHints();
  }
});