addTicketButton.addEventListener("click", () => {
  if (document.querySelector("[data-ticket-id='priority-shipping']")) {
    return;
  }

  ticketList.insertAdjacentHTML(
    "beforeend",
    `<li class="ticket" data-ticket-id="priority-shipping">
      <p class="ticket__title">Priority shipping</p>
      <button data-action="complete" type="button">
        <span>Complete ticket</span>
      </button>
    </li>`,
  );

  status.textContent = "priority-shipping added.";
});