if (typeof window.urlToPreload === 'undefined') {
  let urlToPreload, mouseoverTimer, lastTouchTimestamp;

  const prefetcher = document.createElement("link"),
        isSupported = prefetcher.relList && prefetcher.relList.supports && prefetcher.relList.supports("prefetch"),
        isDataSaverEnabled = navigator.connection && navigator.connection.saveData,
        allowQueryString = "instantAllowQueryString" in document.body.dataset,
        allowExternalLinks = "instantAllowExternalLinks" in document.body.dataset;

  if (isSupported && !isDataSaverEnabled) {
    prefetcher.rel = "prefetch";
    document.head.appendChild(prefetcher);
    const e = { capture: true, passive: true };
    document.addEventListener("touchstart", touchstartListener, e);
    document.addEventListener("mouseover", mouseoverListener, e);
  }

  function touchstartListener(e) {
    lastTouchTimestamp = performance.now();
    const t = e.target.closest("a");
    isPreloadable(t) && (
      t.addEventListener("touchcancel", touchendAndTouchcancelListener, { passive: true }),
      t.addEventListener("touchend", touchendAndTouchcancelListener, { passive: true }),
      urlToPreload = t.href,
      preload(t.href)
    );
  }

  function touchendAndTouchcancelListener() {
    urlToPreload = void 0;
    stopPreloading();
  }

  function mouseoverListener(e) {
    if (performance.now() - lastTouchTimestamp < 1100) return;
    const t = e.target.closest("a");
    isPreloadable(t) && (
      t.addEventListener("mouseout", mouseoutListener, { passive: true }),
      urlToPreload = t.href,
      mouseoverTimer = setTimeout(() => {
        preload(t.href);
        mouseoverTimer = void 0;
      }, 65)
    );
  }

  function mouseoutListener(e) {
    if (e.relatedTarget && e.target.closest("a") == e.relatedTarget.closest("a")) return;
    mouseoverTimer
      ? (clearTimeout(mouseoverTimer), mouseoverTimer = void 0)
      : (urlToPreload = void 0, stopPreloading());
  }

  function isPreloadable(e) {
    if (!e || !e.href) return;
    if (urlToPreload == e.href) return;
    const t = new URL(e.href);
    return (
      (allowExternalLinks || t.origin == location.origin || "instant" in e.dataset) &&
      ["http:", "https:"].includes(t.protocol) &&
      !("http:" == t.protocol && "https:" == location.protocol) &&
      (allowQueryString || !t.search || "instant" in e.dataset) &&
      !(t.hash && t.pathname + t.search == location.pathname + location.search) &&
      !("noInstant" in e.dataset)
    );
  }

  function preload(e) {
    prefetcher.href = e;
  }

  function stopPreloading() {
    prefetcher.removeAttribute("href");
  }
}