Preload subsequent pages, lazy load images and videos, and use Pjax for faster webpage loading with robust error handling and fallback navigation. Ensures no interference with other scripts enhancing media elements.
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// ==UserScript==
// @name Enhanced Faster Webpage Loading with Pjax
// @namespace http://tampermonkey.net/
// @version 2.2
// @description Preload subsequent pages, lazy load images and videos, and use Pjax for faster webpage loading with robust error handling and fallback navigation. Ensures no interference with other scripts enhancing media elements.
// @author Tae
// @match *://*/*
// @grant none
// ==/UserScript==
(function () {
'use strict';
// Utility: Lazy load elements
function setupLazyLoading() {
const lazyElements = Array.from(document.querySelectorAll("img.lazy, video.lazy, iframe.lazy:not([src])"));
function loadLazyElement(el) {
if (!el.dataset.src) return;
if (!el.src) {
el.src = el.dataset.src;
if (el.tagName === "VIDEO") el.load();
}
el.classList.remove("lazy");
}
if ("IntersectionObserver" in window) {
const observer = new IntersectionObserver((entries, observer) => {
entries.forEach(entry => {
if (entry.isIntersecting) {
loadLazyElement(entry.target);
observer.unobserve(entry.target);
}
});
});
lazyElements.forEach(el => observer.observe(el));
} else {
const lazyLoadFallback = () => {
lazyElements.forEach((el, index) => {
if (
el.getBoundingClientRect().top < window.innerHeight &&
el.getBoundingClientRect().bottom > 0 &&
getComputedStyle(el).display !== "none"
) {
loadLazyElement(el);
lazyElements.splice(index, 1);
}
});
if (lazyElements.length === 0) {
document.removeEventListener("scroll", lazyLoadFallback);
window.removeEventListener("resize", lazyLoadFallback);
window.removeEventListener("orientationchange", lazyLoadFallback);
}
};
document.addEventListener("scroll", lazyLoadFallback);
window.addEventListener("resize", lazyLoadFallback);
window.addEventListener("orientationchange", lazyLoadFallback);
}
}
// Utility: Prefetch links on hover
function setupLinkPrefetching() {
const prefetchedLinks = new Set();
document.addEventListener("mouseover", event => {
const link = event.target.closest("a[href]");
if (link && !link.target && !link.rel.includes("nofollow") && !prefetchedLinks.has(link.href)) {
const href = link.href;
if (/^https?:\/\//.test(href) && !href.includes("#")) {
const prefetch = document.createElement("link");
prefetch.rel = "prefetch";
prefetch.href = href;
document.head.appendChild(prefetch);
prefetchedLinks.add(href);
}
}
});
}
// Utility: Initialize Pjax
function initializePjax() {
if (typeof Pjax === "undefined") {
const script = document.createElement("script");
script.src = "https://cdnjs.cloudflare.com/ajax/libs/pjax/0.2.8/pjax.min.js";
script.onload = setupPjax;
document.head.appendChild(script);
} else {
setupPjax();
}
}
function setupPjax() {
const pjax = new Pjax({
elements: "a[href]:not([target]):not([data-pjax-disabled])",
selectors: ["title", ".content"],
cacheBust: true,
});
document.addEventListener("pjax:send", () => console.log("Pjax: Request sent"));
document.addEventListener("pjax:complete", () => {
console.log("Pjax: Request complete");
setupLazyLoading(); // Reinitialize lazy loading
});
document.addEventListener("pjax:error", event => {
console.error("Pjax: Error occurred", event);
if (event.request && event.request.responseURL) {
window.location.href = event.request.responseURL;
} else {
console.warn("Fallback to standard navigation.");
}
});
}
// Initialize everything
document.addEventListener("DOMContentLoaded", () => {
setupLazyLoading();
setupLinkPrefetching();
initializePjax();
});
})();