Prevent autoplay for YouTube, add download button with quality selection, lazy load images and videos, and boost website loading speed with multiple concurrent connections.
当前为
// ==UserScript==
// @name Super Fast Loading
// @namespace http://tampermonkey.net/
// @version 1.4
// @description Prevent autoplay for YouTube, add download button with quality selection, lazy load images and videos, and boost website loading speed with multiple concurrent connections.
// @author Farzan Farhangi
// @match *://*/*
// @grant GM_addStyle
// @grant GM_xmlhttpRequest
// ==/UserScript==
(function() {
'use strict';
// Settings for autoplay prevention and lazy loading
const allowAutoPlayWithinMillisecondsOfClick = 1000;
let lastClickTimeMs = 0;
// Function to create download with multiple connections
const downloadWithMultipleConnections = (url, connections = 18) => {
const chunkSize = Math.ceil(url.length / connections);
const promises = [];
for (let i = 0; i < connections; i++) {
const start = i * chunkSize;
const end = start + chunkSize - 1;
promises.push(
fetch(url, {
headers: { 'Range': `bytes=${start}-${end}` }
})
);
}
return Promise.all(promises)
.then(responses => Promise.all(responses.map(res => res.blob())))
.then(blobs => new Blob(blobs));
};
// Function to prevent autoplay for YouTube videos
const preventAutoplayYouTube = () => {
const videos = document.querySelectorAll('video[data-src]');
videos.forEach(video => {
video.pause();
video.removeAttribute('src');
video.addEventListener('click', () => {
if (!video.src) {
const source = video.getAttribute('data-src');
if (source) {
downloadWithMultipleConnections(source, 32).then(blob => {
video.src = URL.createObjectURL(blob);
video.play();
});
}
}
});
});
};
// Lazy load videos with multiple connections
const lazyLoadVideos = () => {
const videos = document.querySelectorAll('video[data-src]');
const observer = new IntersectionObserver(entries => {
entries.forEach(entry => {
if (entry.isIntersecting) {
const video = entry.target;
downloadWithMultipleConnections(video.getAttribute('data-src'), 32).then(blob => {
video.src = URL.createObjectURL(blob);
video.play();
observer.unobserve(video);
});
}
});
});
videos.forEach(video => observer.observe(video));
};
// Check if autoplay is allowed based on last click time
const isAutoPlayAllowed = () => (Date.now() - lastClickTimeMs) <= allowAutoPlayWithinMillisecondsOfClick;
window.addEventListener('click', () => { lastClickTimeMs = Date.now(); });
// Enable lazy loading for images
const enableLazyLoadImages = () => {
const images = document.querySelectorAll('img:not([loading])');
images.forEach(img => img.setAttribute('loading', 'lazy'));
};
// Load scripts asynchronously with multiple connections
const loadScriptAsync = (url) => {
downloadWithMultipleConnections(url, 18).then(blob => {
const script = document.createElement('script');
script.src = URL.createObjectURL(blob);
script.defer = true;
document.head.appendChild(script);
});
};
// Load CSS immediately with multiple connections
const loadCSS = (url) => {
downloadWithMultipleConnections(url, 18).then(blob => {
const link = document.createElement('link');
link.rel = 'stylesheet';
link.href = URL.createObjectURL(blob);
document.head.appendChild(link);
});
};
// Preload critical resources at the start
const preloadResources = async () => {
const criticalResources = [
'https://example.com/styles.css',
'https://example.com/script.js',
// Add other resources here as needed
];
criticalResources.forEach(resource => {
if (resource.endsWith('.css')) {
loadCSS(resource);
} else if (resource.endsWith('.js')) {
loadScriptAsync(resource);
}
});
};
// Add custom CSS styles for the download button
GM_addStyle(`
#custom-download-button {
position: absolute;
top: 50%;
left: 50%;
transform: translate(-50%, -50%);
background-color: #3399ff; /* Pastel blue */
color: white;
border: none;
padding: 10px 28px;
border-radius: 25px;
font-size: 14px;
cursor: pointer;
z-index: 1000;
}
#modal-overlay {
position: fixed;
top: 0;
left: 0;
width: 100%;
height: 100%;
background-color: rgba(0, 0, 0, 0.5);
display: none;
justify-content: center;
align-items: center;
z-index: 2000;
}
#modal-content {
background-color: white;
padding: 20px;
border-radius: 8px;
width: 80%;
max-width: 600px;
overflow: hidden;
}
/* Adjust iframe settings */
#modal-content iframe {
width: 100%;
height: 400px;
border: none;
}
`);
// Create download button
function createDownloadButton() {
const downloadButton = document.createElement('button');
downloadButton.id = 'custom-download-button';
downloadButton.innerText = 'VIDEO DOWNLOAD';
downloadButton.onclick = showModal;
// Add the button to the YouTube video controls
const interval = setInterval(() => {
const controls = document.querySelector('.ytp-right-controls');
if (controls && !document.getElementById('custom-download-button')) {
controls.insertBefore(downloadButton, controls.firstChild);
clearInterval(interval);
}
}, 1000);
}
// Display modal
function showModal() {
const overlay = document.createElement('div');
overlay.id = 'modal-overlay';
overlay.onclick = hideModal;
const modalContent = document.createElement('div');
modalContent.id = 'modal-content';
// Create iframe for y2mate site
const iframe = document.createElement('iframe');
const videoID = window.location.href.split('v=')[1]?.split('&')[0];
if (videoID) {
iframe.src = `https://www.y2mate.com/youtube/${videoID}`;
}
modalContent.appendChild(iframe);
overlay.appendChild(modalContent);
document.body.appendChild(overlay);
overlay.style.display = 'flex';
}
// Hide modal
function hideModal() {
const overlay = document.getElementById('modal-overlay');
if (overlay) {
overlay.remove();
}
}
// Disable autoplay for YouTube videos
function disableAutoPlay() {
const player = document.querySelector('video');
if (player) {
player.autoplay = false;
player.pause();
}
}
// Run code when page loads
window.addEventListener('yt-navigate-finish', () => {
disableAutoPlay();
createDownloadButton();
});
// Execute code on initial load
window.onload = () => {
disableAutoPlay();
createDownloadButton();
enableLazyLoadImages();
preloadResources();
preventAutoplayYouTube();
lazyLoadVideos();
};
})();
QingJ © 2025
镜像随时可能失效，请加Q群300939539或关注我们的公众号极客氢云获取最新地址