script for tampermonkey to disable all website animations

animations_disabler.userscript

// ==UserScript==
// @name         Disable all animations
// @version      1.0
// @author       mortenmoulder
// @include      *
// @grant        GM_addStyle
// @grant        GM_addElement
// @description   Animation Remover
// ==/UserScript==

//remove animations globally
GM_addStyle("* { animation-duration: 0s !important; animation-play-state: paused; }");

var ignoreElements = [];

//remove animations inside shadow DOM elements
function findShadowRoots(elements) {
    for (var i = 0; i < elements.length; i++) {
        if(elements[i].shadowRoot) {

            if(ignoreElements.includes(elements[i].shadowRoot) == false) {
                GM_addElement(elements[i].shadowRoot, 'style', { textContent: '* { animation-duration: 0s !important; animation-play-state: paused;' });
                ignoreElements.push(elements[i].shadowRoot);
            }

            findShadowRoots(elements[i].shadowRoot.querySelectorAll("*"));
        }
    }
}

//remove animations every 1 second
setInterval(() => {
    var allNodes = document.querySelectorAll('*');
    findShadowRoots(allNodes);
}, 1000);