tampermonkey script to filter redgifs tags

redgifs_filter.js

// ==UserScript==
// @name         redgifs_filter
// @namespace    http://tampermonkey.net/
// @version      0.1
// @description  remove gifs with specified tags
// @author       You
// @match        https://www.redgifs.com/*
// @icon         https://www.google.com/s2/favicons?domain=redgifs.com
// @grant        none
// ==/UserScript==

window._redgifs_filter_removeCount = 0;

function countRemoved() {
    window._redgifs_filter_removeCount++;
    const cel = document.querySelector("#rf-removecount");
    if (cel) {
        cel.innerText = window._redgifs_filter_removeCount;
    } else {
        const css = "background: darkred; border-radius: 18px; padding: 9px; margin: 9px;";
        const lel = document.querySelector('.links');
        const tag = `<span id="rf-removecount" title="removed by redgifs_filter" style="${css}">1</span>`;
        if(lel) lel.insertAdjacentHTML('afterend', tag);
    }
}

(function() {
    'use strict';

    const excludeTags = ["#Cuckold", "#Exhibitionism"];

    // /watch dom structure is different from /browse /users etc
    // (also location updated dynamically, re-eval on every event)
    const isWatchPage = () => location.pathname.startsWith("/watch");

    function getTags(el) {
        const selector = isWatchPage() ? ".tags a.tag span.name" : ".tags li";
        let ret = Array.from(el.querySelectorAll(selector)).map(e => e.innerText);
        return ret.map(t => t.startsWith("#") ? t : "#" + t);
    }

    function removeExcluded(el) {
        try {
            if (!el || !el.querySelectorAll) return;
            if (isWatchPage()) {
                el = el.closest('.feed-item');
            } else {
                el = el.closest('.tile');
            }
            if (!el || !el.querySelectorAll) return;

            const tags = getTags(el);
            console.log(tags, el)

            if(tags.find(t => excludeTags.includes(t))) {
                el.remove();
                countRemoved();
            }
        } catch (ex) {
            console.error("redgifs_filter", ex)
        }
    }

    function observeChanges(el) {
        new MutationObserver(mutations => {
            mutations.forEach(mutation => {
                mutation.addedNodes.forEach(removeExcluded);
            });
        }).observe(el, {
            // .tile added first .meta later so need subtree
            characterData: false, attributes: false, childList: true, subtree: true
        });
        el.querySelectorAll(".tile").forEach(removeExcluded);
    }

    observeChanges(document.querySelector("#app"));

})();

if anyone stumbles on this, I wrote an updated version: https://gist.github.com/hazushi3/3c995294eeb7baff6694a29f9d457e83