text: const dropdown = document.querySelector(".js-dropdown");
  const container = document.querySelector(".dropdowncontainer");
  const arrow = document.querySelector(".js-arrow");
  function changeDropdown() {
    const isClose = container.classList.contains("hidden");
    // close arrow
    arrow.classList.remove("changeArrow");
    // close container
    container.classList.add("hidden");
    // toggle arrow
    if (isClose) {
      arrow.classList.add("changeArrow");
      arrow.classList.remove("dropdown__arrow");
      container.classList.remove("hidden");
    } else {
      arrow.classList.remove("changeArrow");
      arrow.classList.add("dropdown__arrow");
      container.classList.add("hidden");
    }
  }
  dropdown.addEventListener("click", changeDropdown);
  