one/dist/esm/views/PreloadLinks.mjs

One is a new React Framework that makes Vite serve both native and web.

import { useEffect, useRef } from "react";
import { getURL } from "../getURL.mjs";
import { preloadRoute } from "../router/router.mjs";
const PREFETCH_MODE = process.env.ONE_LINK_PREFETCH || "intent";
function PreloadLinks() {
  if (typeof window > "u" || !import.meta.env.PROD || PREFETCH_MODE === "false") return null;
  const cleanupRef = useRef(null);
  return useEffect(() => {
    const url = getURL(),
      getHrefFromTarget = target => {
        if (!(target instanceof HTMLElement)) return null;
        const anchor = target instanceof HTMLAnchorElement ? target : target.closest("a");
        if (!(anchor instanceof HTMLAnchorElement)) return null;
        const href = anchor.getAttribute("href");
        return href && (href[0] === "/" || href.startsWith(url)) ? href.replace(url, "") : null;
      };
    if (PREFETCH_MODE === "hover") {
      const controller = new AbortController();
      return document.addEventListener("mouseover", e => {
        const href = getHrefFromTarget(e.target);
        href && preloadRoute(href);
      }, {
        passive: !0,
        signal: controller.signal
      }), () => controller.abort();
    }
    if (PREFETCH_MODE === "viewport") return import("../link/prefetchViewport.mjs").then(({
      startPrefetchViewport,
      observePrefetchViewport
    }) => {
      startPrefetchViewport(preloadRoute);
      const cleanups = [],
        seen = /* @__PURE__ */new WeakSet(),
        observeLinks = () => {
          document.querySelectorAll('a[href^="/"], a[href^="' + url + '"]').forEach(link => {
            if (seen.has(link)) return;
            seen.add(link);
            const href = link.getAttribute("href");
            href && cleanups.push(observePrefetchViewport(link, href.replace(url, "")));
          });
        };
      observeLinks();
      let timeout;
      const observer = new MutationObserver(() => {
        clearTimeout(timeout), timeout = setTimeout(observeLinks, 100);
      });
      observer.observe(document.body, {
        childList: !0,
        subtree: !0
      }), cleanupRef.current = () => {
        clearTimeout(timeout), cleanups.forEach(c => c()), observer.disconnect();
      };
    }), () => cleanupRef.current?.();
    if (PREFETCH_MODE === "intent") {
      const controller = new AbortController();
      return import("../link/prefetchIntent.mjs").then(({
        startPrefetchIntent,
        observePrefetchIntent
      }) => {
        startPrefetchIntent(preloadRoute);
        const cleanups = [],
          seen = /* @__PURE__ */new WeakSet(),
          observeLinks = () => {
            document.querySelectorAll('a[href^="/"], a[href^="' + url + '"]').forEach(link => {
              if (seen.has(link)) return;
              seen.add(link);
              const href = link.getAttribute("href");
              href && cleanups.push(observePrefetchIntent(link, href.replace(url, "")));
            });
          };
        observeLinks();
        let timeout;
        const observer = new MutationObserver(() => {
          clearTimeout(timeout), timeout = setTimeout(observeLinks, 100);
        });
        observer.observe(document.body, {
          childList: !0,
          subtree: !0
        }), cleanupRef.current = () => {
          clearTimeout(timeout), cleanups.forEach(c => c()), observer.disconnect();
        }, document.addEventListener("mouseover", e => {
          const href = getHrefFromTarget(e.target);
          href && preloadRoute(href);
        }, {
          passive: !0,
          signal: controller.signal
        });
      }), () => {
        controller.abort(), cleanupRef.current?.();
      };
    }
  }, []), null;
}
export { PreloadLinks };
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