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Reduce the size of YouTube thumbnails
// ==UserScript==
// @name Small YouTube Thumbnails
// @namespace http://tampermonkey.net/
// @version 2024-09-16
// @description Reduce the size of YouTube thumbnails
// @author Niji Bemani
// @match https://www.youtube.com/*
// @icon https://www.google.com/s2/favicons?sz=64&domain=youtube.com
// @grant none
// @licence MIT
// ==/UserScript==
(function() {
'use strict';
// Minimize all thumbnails
const minimizeThumbnails = function() {
document.querySelectorAll('ytd-thumbnail, ytd-playlist-thumbnail, ytd-channel-renderer #avatar-section, ytd-movie-renderer .thumbnail-container')
.forEach(node => {node.style.maxWidth = 0});
};
// Add a MutationObserver on ytd-app element
const startObserver = function() {
// Select the node that will be observed for mutations
const targetNode = document.querySelector("ytd-app");
// Callback function to execute when mutations are observed
const callback = (mutationList, observer) => {
// Minimize thumbnails if any of below elements are found in added nodes
const targetElements = ["YTD-VIDEO", "YTD-PLAYLIST", "YTD-CHANNEL", "YTD-RADIO", "YTD-MOVIE"];
// Loop through added nodes
for (const mutation of mutationList) {
if (mutation.type === "childList" && mutation.addedNodes.length) {
for (let index = 0; index < mutation.addedNodes.length; index++) {
if (targetElements.some(targetName => mutation.addedNodes.item(index).nodeName.includes(targetName))) {
return minimizeThumbnails();
}
}
}
}
};
// Create an observer instance linked to the callback function
const observer = new MutationObserver(callback);
// Set observer to the target node
observer.observe(targetNode,{
attributes: false, childList: true, subtree: true
});
};
// Start observer
setTimeout(function(){
startObserver();
}, 100);
})();