(function () {
  "use strict";

  var scrollTopButtons = document.querySelectorAll(".footer-scroll-top");

  if (!scrollTopButtons.length) {
    return;
  }

  function goToPageTop() {
    window.scrollTo({
      top: 0,
      behavior: "smooth",
    });
  }

  function updateButtonVisibility() {
    var shouldShowButton = window.scrollY > 300;

    scrollTopButtons.forEach(function (button) {
      button.classList.toggle("active", shouldShowButton);
    });
  }

  scrollTopButtons.forEach(function (button) {
    button.setAttribute("role", "button");
    button.setAttribute("tabindex", "0");
    button.setAttribute("aria-label", "Scroll to top");

    button.addEventListener("click", goToPageTop);
    button.addEventListener("keydown", function (event) {
      if (event.key === "Enter" || event.key === " ") {
        event.preventDefault();
        goToPageTop();
      }
    });
  });

  window.addEventListener("scroll", updateButtonVisibility, {
    passive: true,
  });

  updateButtonVisibility();
})();