Remove Youtube notification counter

remove-youtube-notification-counter.user.js

// ==UserScript==
// @name             Remove Youtube notification counter
// @match            *://youtube.com/*
// @match            *://*.youtube.com/*
// @run-at           document-idle
// @version          202401282042
// @author           Nuno Cunha
// @homepage         https://gist.github.com/nunocunha/4ef42efe582633a4657112a754c1bd3c
// ==/UserScript==

(() => {
  const fixTitle = (() => {
    let previousTitle = '';

    return (titleNode) => {
      const hasTitle = titleNode !== undefined && titleNode !== null;

      if (hasTitle && previousTitle !== titleNode.textContent) {
        titleNode.textContent = titleNode.textContent.replace(/^\(\d+\)\s+/, '');
        previousTitle = titleNode.textContent;
      }
    };
  })();

  const observer = new MutationObserver((mutations) => fixTitle(mutations[0]?.target));

  observer.observe(
    document.querySelector('title'), {
      subtree: true,
      characterData: true,
      childList: true
    }
  );

  fixTitle(document.querySelector('title'));
})();