Pxls Chat Purged Message Viewer

// ==UserScript==
// @name         Pxls Chat Purged Message Viewer
// @namespace    http://tampermonkey.net/
// @version      0.1.01
// @description  try to take over the world!
// @author       You
// @match        https://pxls.space/
// @grant        none
// ==/UserScript==

(function() {
    'use strict';

    var chatNodeHistory = new Map();
    function timer() {
        let chatBody = document.getElementById('chat-body');
        let oldSize = chatNodeHistory.size;
        for (let node of chatBody.childNodes) {
            let id = node.dataset.id;
            if (id) {
                chatNodeHistory.set(id, node);
            }
        }
        let newCount = chatNodeHistory.size - oldSize;
        if (newCount) console.log(`Saved ${newCount} nodes.`)
        let lastId = null;
        let purgedCount = 0;
        for (let [id, node] of chatNodeHistory) {
            let visibleNode = chatBody.querySelector(`[data-id="${id}"]`);
            if (!visibleNode) {
                node.querySelector(`span`).style.color = 'red';
                let lastNode = chatBody.querySelector(`[data-id="${lastId}"]`);
                if (lastNode) lastNode.after(node);
                purgedCount++;
            }
            lastId = id;
        }
        if (purgedCount) console.log(`Detected ${purgedCount} purged nodes.`)
    }
    var timerVar = setInterval(timer, 5000);
})();