YouTube Restore Fullscreen Scrolling

Strips the deprecate-fullerscreen-ui attribute everywhere on YouTube, early and repeatedly

Від 05.09.2025. Дивіться остання версія.

You will need to install an extension such as Tampermonkey, Greasemonkey or Violentmonkey to install this script.

You will need to install an extension such as Tampermonkey to install this script.

You will need to install an extension such as Tampermonkey or Violentmonkey to install this script.

You will need to install an extension such as Tampermonkey or Userscripts to install this script.

You will need to install an extension such as Tampermonkey to install this script.

You will need to install a user script manager extension to install this script.

(У мене вже є менеджер скриптів, дайте мені встановити його!)

You will need to install an extension such as Stylus to install this style.

You will need to install an extension such as Stylus to install this style.

You will need to install an extension such as Stylus to install this style.

You will need to install a user style manager extension to install this style.

You will need to install a user style manager extension to install this style.

You will need to install a user style manager extension to install this style.

(I already have a user style manager, let me install it!)

// ==UserScript==
// @name         YouTube Restore Fullscreen Scrolling
// @namespace    waldoocs-tools
// @version      1.3
// @description  Strips the deprecate-fullerscreen-ui attribute everywhere on YouTube, early and repeatedly
// @author       Waldoocs
// @match        https://www.youtube.com/*
// @match        https://m.youtube.com/*
// @run-at       document-start
// @inject-into  page
// @noframes
// @license      MIT
// ==/UserScript==

(function () {
  'use strict';
  const ATTR = 'deprecate-fullerscreen-ui';

  // Block attempts to set the attribute
  try {
    const origSetAttribute = Element.prototype.setAttribute;
    const origSetAttributeNS = Element.prototype.setAttributeNS;
    const origToggleAttribute = Element.prototype.toggleAttribute;

    Element.prototype.setAttribute = function (name, value) {
      if (name === ATTR) return;
      return origSetAttribute.call(this, name, value);
    };
    Element.prototype.setAttributeNS = function (ns, name, value) {
      if (name === ATTR) return;
      return origSetAttributeNS.call(this, ns, name, value);
    };
    Element.prototype.toggleAttribute = function (name, force) {
      if (name === ATTR) return false;
      return origToggleAttribute.call(this, name, force);
    };
  } catch (e) {
    // ignore
  }

  function stripIn(node) {
    if (!node || node.nodeType !== 1) return;
    if (node.hasAttribute(ATTR)) node.removeAttribute(ATTR);
    if (node.querySelectorAll) {
      for (const el of node.querySelectorAll('[' + ATTR + ']')) {
        el.removeAttribute(ATTR);
      }
    }
  }

  function sweep() {
    stripIn(document.documentElement);
  }

  // First sweep
  sweep();

  // Observe attribute changes and new nodes
  const mo = new MutationObserver(muts => {
    for (const m of muts) {
      if (m.type === 'attributes' && m.attributeName === ATTR && m.target instanceof Element) {
        m.target.removeAttribute(ATTR);
      } else if (m.type === 'childList') {
        for (const n of m.addedNodes) stripIn(n);
      }
    }
  });

  const startObserver = () => {
    mo.observe(document.documentElement, {
      subtree: true,
      attributes: true,
      attributeFilter: [ATTR],
      childList: true
    });
  };

  if (document.documentElement) startObserver();
  else document.addEventListener('readystatechange', startObserver, { once: true });

  // Handle YouTube SPA navigations
  window.addEventListener('yt-navigate-finish', sweep);
  window.addEventListener('yt-page-data-updated', sweep);

  // Extra sweeps for the first ~10 seconds
  let i = 0;
  const interval = setInterval(() => {
    sweep();
    if (++i > 100) clearInterval(interval);
  }, 100);
})();