Preload subsequent pages, lazy load images and videos, and use Pjax for faster webpage loading with robust error handling and fallback navigation.
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// ==UserScript==
// @name Enhanced Faster Webpage Loading with Pjax
// @namespace http://tampermonkey.net/
// @version 1.9
// @description Preload subsequent pages, lazy load images and videos, and use Pjax for faster webpage loading with robust error handling and fallback navigation.
// @author Tae
// @match *://*/*
// @grant none
// ==/UserScript==
(function () {
'use strict';
// Lazy load images, videos, and multimedia
document.addEventListener("DOMContentLoaded", () => {
const lazyElements = Array.from(document.querySelectorAll("img.lazy, video.lazy, iframe.lazy"));
function loadLazyElement(el) {
const dataSrc = el.dataset.src;
if (!dataSrc) return;
el.src = dataSrc;
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); // Remove loaded element
}
});
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);
}
});
// Prefetch links
document.addEventListener("mouseover", event => {
const link = event.target.closest("a[href]");
if (link && !link.target && !link.rel.includes("nofollow")) {
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);
}
}
});
// 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])", // Only internal links
selectors: ["title", ".content"], // Elements to update
cacheBust: true, // Force cache refresh
});
document.addEventListener("pjax:send", () => console.log("Pjax: Request sent"));
document.addEventListener("pjax:complete", () => {
console.log("Pjax: Request complete");
reinitializeLazyLoading();
});
document.addEventListener("pjax:error", event => {
console.error("Pjax: Error occurred", event);
// Fallback to normal navigation
window.location.href = event.request.responseURL || event.target.href;
});
}
function reinitializeLazyLoading() {
const newLazyElements = Array.from(document.querySelectorAll("img.lazy, video.lazy, iframe.lazy:not([src])"));
if ("IntersectionObserver" in window) {
const observer = new IntersectionObserver((entries, observer) => {
entries.forEach(entry => {
if (entry.isIntersecting) {
const el = entry.target;
el.src = el.dataset.src;
if (el.tagName === "VIDEO") el.load();
observer.unobserve(el);
}
});
});
newLazyElements.forEach(el => observer.observe(el));
}
}
// Initialize the script
initializePjax();
})();