Strips the deprecate-fullerscreen-ui attribute everywhere on YouTube, early and repeatedly
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// ==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);
})();