Hide chat on YouTube live videos by default.
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// ==UserScript==
// @name YouTube - Hide chat by default
// @namespace amekusa.yt-hide-chat
// @author amekusa
// @version 1.1.3
// @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 interval = 1500;
let debug = false ? console.debug : (() => {});
// --------------
let hide = true;
let url = window.location.href;
let find = () => {
try {
let frame = doc.querySelector('iframe#chatframe');
if (!frame) return null;
frame = frame.contentWindow.document;
if (!frame.querySelector('yt-live-chat-item-list-renderer #items')) return null; // wait actual messages show up before close
return frame.querySelector('yt-live-chat-header-renderer #close-button button');
} catch (e) {
return null;
}
};
let unhide = () => {
debug('unhide');
hide = false;
};
let update = () => {
// only work with a video page
if (!window.location.href.startsWith('https://www.youtube.com/watch?')) return;
// hook "Show chat" button
let btn = doc.querySelector('#chat-container #show-hide-button button');
if (btn) {
btn.removeEventListener('click', unhide);
btn.addEventListener('click', unhide);
}
// detect url change
if (url != window.location.href) {
url = window.location.href;
debug('url changed:', url);
hide = true;
} else if (!hide) return;
// find & click the close button
btn = find();
if (btn) {
debug('click:', btn);
btn.dispatchEvent(new Event('click'));
}
};
doc.addEventListener('DOMContentLoaded', () => {
setInterval(update, interval);
});
})(document);