Automatically pause videos when tab is in background and resume when returning
目前為
// ==UserScript==
// @name Auto Pause Background Videos
// @namespace http://tampermonkey.net/
// @version 2.0
// @description Automatically pause videos when tab is in background and resume when returning
// @author You
// @match *://*/*
// @grant none
// @run-at document-end
// ==/UserScript==
(function() {
'use strict';
const videoStates = new Map(); // Track video playing states
function getAllVideos() {
return Array.from(document.querySelectorAll('video'));
}
function pauseAllVideos() {
const videos = getAllVideos();
console.log(`[Video Controller] Found ${videos.length} videos, pausing active ones...`);
videos.forEach(video => {
try {
// Check if video is actually playing
const isPlaying = !video.paused && !video.ended && video.readyState > 2;
if (isPlaying) {
videoStates.set(video, true);
video.pause();
console.log('[Video Controller] Paused:', video.src || video.currentSrc || 'unknown source');
} else if (!videoStates.has(video)) {
// Mark as not playing if we haven't tracked it yet
videoStates.set(video, false);
}
} catch (e) {
console.error('[Video Controller] Error pausing video:', e);
}
});
}
function resumeVideos() {
const videos = getAllVideos();
console.log(`[Video Controller] Resuming previously playing videos...`);
videos.forEach(video => {
try {
const wasPlaying = videoStates.get(video);
if (wasPlaying === true) {
video.play().then(() => {
console.log('[Video Controller] Resumed:', video.src || video.currentSrc || 'unknown source');
}).catch(e => {
console.log('[Video Controller] Could not resume:', e.message);
});
videoStates.set(video, false); // Reset state
}
} catch (e) {
console.error('[Video Controller] Error resuming video:', e);
}
});
}
// Listen for visibility changes
document.addEventListener('visibilitychange', function() {
if (document.hidden) {
console.log('[Video Controller] Tab hidden - pausing videos');
pauseAllVideos();
} else {
console.log('[Video Controller] Tab visible - resuming videos');
// Small delay to ensure page is ready
setTimeout(resumeVideos, 100);
}
});
// Also listen for blur/focus events as backup
window.addEventListener('blur', function() {
if (!document.hidden) {
console.log('[Video Controller] Window blur - pausing videos');
pauseAllVideos();
}
});
window.addEventListener('focus', function() {
if (!document.hidden) {
console.log('[Video Controller] Window focus - resuming videos');
setTimeout(resumeVideos, 100);
}
});
// Watch for new videos being added
const observer = new MutationObserver(function(mutations) {
mutations.forEach(function(mutation) {
mutation.addedNodes.forEach(function(node) {
if (node.tagName === 'VIDEO') {
console.log('[Video Controller] New video detected');
} else if (node.querySelectorAll) {
const newVideos = node.querySelectorAll('video');
if (newVideos.length > 0) {
console.log(`[Video Controller] ${newVideos.length} new video(s) detected`);
}
}
});
});
});
// Start observing
observer.observe(document.body, {
childList: true,
subtree: true
});
console.log('[Video Controller] Auto Pause Background Videos loaded and active');
console.log('[Video Controller] Initial videos found:', getAllVideos().length);
})();