Tampermonkey script to remove Unread Mentions on Slack due to slackbot

script.js

// ==UserScript==
// @name         block-slackbot
// @namespace    http://tampermonkey.net/
// @version      0.1
// @description  try to take over the world!
// @author       @OrkoHunter
// @match        https://kossiitkgp.slack.com/*
// @grant        none
// ==/UserScript==

(function() {
    'use strict';

    document.addEventListener("DOMContentLoaded", function(event) {
        var removeUnreadMentions = function() {
            var listOfButtons = document.getElementsByClassName("p-channel_sidebar__banner--mentions");
            console.log("yolo listOfButtons ", listOfButtons);
            for (let l of listOfButtons) {
                if (l.dataset.qaLinkedId == "D0H8R7Y7P") {
                    console.log("yolo found it");
                    l.style.visibility = 'hidden';
                }
            }
        };

        var element = document.getElementsByClassName("client_channels_list_container")[0];
        console.log("yolo element is ", element);

        removeUnreadMentions();
        element.onmousewheel = removeUnreadMentions;

    });

})();