Preload subsequent pages, lazy load images and videos, and use Pjax for faster webpage loading with robust error handling.
Version au
// ==UserScript==
// @name Enhanced Faster Webpage Loading
// @namespace http://tampermonkey.net/
// @version 1.8
// @description Preload subsequent pages, lazy load images and videos, and use Pjax for faster webpage loading with robust error handling.
// @author Tae
// @match *://*/*
// @grant none
// ==/UserScript==
(function () {
'use strict';
// Lazy load images, videos, and multimedia
document.addEventListener("DOMContentLoaded", function () {
let lazyElements = Array.from(document.querySelectorAll("img.lazy, video.lazy, iframe.lazy"));
function loadLazyElement(lazyElement) {
const dataSrc = lazyElement.dataset.src;
if (!dataSrc) return;
lazyElement.src = dataSrc;
if (lazyElement.tagName === "VIDEO") {
lazyElement.load();
}
lazyElement.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(element => observer.observe(element));
} else {
// Fallback for browsers without IntersectionObserver
const lazyLoadFallback = () => {
lazyElements = lazyElements.filter(lazyElement => {
if (
lazyElement.getBoundingClientRect().top < window.innerHeight &&
lazyElement.getBoundingClientRect().bottom > 0 &&
getComputedStyle(lazyElement).display !== "none"
) {
loadLazyElement(lazyElement);
return false; // Remove from list
}
return true; // Keep in list
});
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 subsequent pages
document.addEventListener("mouseover", event => {
const target = event.target;
if (target.tagName === "A" && target.href) {
const link = target.href;
if (/relevant-part|pattern/.test(link)) { // Refine prefetch condition
const prefetchLink = document.createElement("link");
prefetchLink.rel = "prefetch";
prefetchLink.href = link;
document.head.appendChild(prefetchLink);
}
}
});
// Load and initialize Pjax
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 = initializePjax;
document.head.appendChild(script);
} else {
initializePjax();
}
function initializePjax() {
const pjax = new Pjax({
elements: "a[href]", // Target links
selectors: ["title", ".content"], // Update these elements
cacheBust: true, // Cache busting for fresh content
});
// Pjax event listeners
document.addEventListener("pjax:send", () => console.log("Pjax: Request sent."));
document.addEventListener("pjax:complete", () => {
console.log("Pjax: Request complete.");
reinitializeLazyLoading(); // Reinitialize lazy loading for new content
});
document.addEventListener("pjax:error", event => {
console.error("Pjax: Error occurred.", event);
// Fallback to full reload
window.location.href = event.request.responseURL || window.location.href;
});
}
function reinitializeLazyLoading() {
const newLazyElements = Array.from(document.querySelectorAll("img.lazy, video.lazy, iframe.lazy:not([src])"));
newLazyElements.forEach(element => {
if (!element.dataset.src) return; // Skip invalid elements
const observer = new IntersectionObserver((entries, observer) => {
entries.forEach(entry => {
if (entry.isIntersecting) {
element.src = element.dataset.src;
observer.unobserve(element);
}
});
});
observer.observe(element);
});
}
})();