Hide chat on YouTube live videos by default.
// ==UserScript==
// @name YouTube - Hide chat by default
// @namespace amekusa.yt-hide-chat
// @author amekusa
// @version 1.2.1
// @description Hide chat on YouTube live videos by default.
// @match https://www.youtube.com/*
// @run-at document-start
// @grant none
// @license MIT
// @homepage https://github.com/amekusa/monkeyscripts
// ==/UserScript==
(function (doc) {
// --- config ---
let wait = 4000; // initial wait time (ms)
let interval = 2000; // update interval (ms)
let match = /^https:\/\/www\.youtube\.com\/(?:watch\?|clip\/)/; // url pattern
let debug = false ? console.debug : (() => {});
// --------------
let watcher;
let hide;
let url;
function findCloseButton() {
try {
let el = doc.querySelector('iframe#chatframe');
if (!el) return null;
el = el.contentWindow.document;
if (!el.querySelector('yt-live-chat-item-list-renderer #items [id], yt-live-chat-item-list-renderer #empty-state-message')) return null;
return el.querySelector('yt-live-chat-header-renderer #close-button button');
} catch (e) {
return null;
}
}
function unhide() {
debug('unhide.');
hide = false;
}
function update() {
if (!window.location.href.match(match)) return; // do nothing
// detect url change
if (url != window.location.href) {
debug('url changed:', window.location.href);
return init();
}
if (!hide) return;
// find & click the close button
let btn = findCloseButton();
if (btn) {
debug('click:', btn);
return btn.dispatchEvent(new Event('click'));
}
// hook "Show chat" button
btn = doc.querySelector('#chat-container #show-hide-button button');
if (btn) {
btn.removeEventListener('click', unhide);
btn.addEventListener('click', unhide);
}
}
function init() {
if (watcher) clearInterval(watcher);
debug('initializing...');
hide = true;
url = window.location.href;
setTimeout(() => {
watcher = setInterval(update, interval);
debug('initialized.');
update();
}, wait);
}
doc.addEventListener('DOMContentLoaded', init);
})(document);