YouTube Live Chat Resurrection のソースコード

YouTube Live Chat Resurrection

Fixes missing live chat on YouTube livestreams. Reloads once, then forces chat to appear instantly on every stream. Fixed for archived livestreams

スクリプトをインストール ?

このスクリプトの質問や評価の投稿はこちら、通報はこちらへお寄せください

右端で折り返す

// ==UserScript==
// @name         YouTube Live Chat Resurrection
// @namespace    yt-autofix
// @version      1.1
// @description  Fixes missing live chat on YouTube livestreams. Reloads once, then forces chat to appear instantly on every stream. Fixed for archived livestreams
// @author       KiyoshiNatsumi
// @match        https://www.youtube.com/*
// @run-at       document-end
// @license      MIT
// ==/UserScript==

(function() {
'use strict';

let lastVideoId = null;
let reloadedThisSession = false;
let chatReady = false;
let reloadCount = 0;

function getVideoId() {
  return new URL(location.href).searchParams.get('v');
}

function isLivestream() {
  const meta = document.querySelector('meta[itemprop="isLiveBroadcast"]');
  if (meta && meta.content === "true") return true;
  return location.href.includes('/watch') && location.href.includes('live');
}

function isLiveArchive() {
  const meta = document.querySelector('meta[itemprop="isLiveBroadcast"]');
  return meta && meta.content === "false";
}

function forceChatLoad(retry = 0) {
  if (chatReady) return;
  const vid = getVideoId();
  if (!vid) return;
  const chatFrame = document.querySelector('iframe#chatframe');
  if (!chatFrame) {
    if (retry < 15) setTimeout(() => forceChatLoad(retry + 1), 1000);
    return;
  }

  const src = chatFrame.getAttribute('src') || '';
  if (!src.includes('live_chat')) {
    chatFrame.src = `https://www.youtube.com/live_chat?v=${vid}&is_popout=1`;
    return;
  }

  try {
    const doc = chatFrame.contentDocument;
    const hasChat = doc?.querySelector('#chat');
    if (hasChat) {
      chatReady = true;
      return;
    }

    if (!hasChat && reloadCount < 2 && isLivestream()) {
      reloadCount++;
      setTimeout(() => {
        chatFrame.src = chatFrame.src;
        forceChatLoad();
      }, 1500);
    }
  } catch (e) {}
}

function handleVideoChange() {
  const vid = getVideoId();
  if (!vid || vid === lastVideoId) return;
  lastVideoId = vid;
  chatReady = false;
  reloadCount = 0;

  if (isLivestream() && !reloadedThisSession) {
    reloadedThisSession = true;
    console.log('[Live Chat Resurrection] Detected LIVE → reloading once...');
    setTimeout(() => location.reload(), 1200);
  } else {
    setTimeout(() => forceChatLoad(), 2000);
  }
}

const observer = new MutationObserver(() => handleVideoChange());
observer.observe(document.body, { childList: true, subtree: true });

setTimeout(() => {
  const vid = getVideoId();
  if (!vid) return;
  if (isLivestream() && !reloadedThisSession) {
    console.log('[Live Chat Resurrection] First live detected → reload once');
    reloadedThisSession = true;
    setTimeout(() => location.reload(), 1200);
  } else {
    forceChatLoad();
  }
}, 2000);
})();