fixed_v.js

// ==UserScript==
// @name         Review Queue Notifier
// @namespace    stackexchange.com
// @version      0.1
// @description  Notifies you with a desktop-notification of any reviews on any sites where you have review privileges on
// @author       Daniil
// @include      /^https://stackexchange.com/users/\d+/
// @grant        GM_xmlhttpRequest
// @connect      *
// ==/UserScript==

(async function() {
  'use strict';

  const userid = window.location.href.split('/')[4];
  const API_KEY = 'BsS8W0LXZaGo9s8qNRRrvg((';
  const filter = '!*LB1tiXePck5wP0y';

  Notification.requestPermission();
  async function notifyMe(queue, site, sitename) {
    if (!("Notification" in window)) alert("This browser does not support desktop notification");
    else if (Notification.permission === "granted") {
      var notification = new Notification(queue + ' on ' + sitename, {
        body: 'Click to go there!',
        icon: site + '/favicon.ico'
      });

      notification.onclick = function(event) {
        event.preventDefault(); // prevent the browser from focusing the Notification's tab
        window.open(site + '/review', '_blank');
      };
    }
    else if (Notification.permission !== "denied") Notification.requestPermission();
    await new Promise(x => setTimeout(x, 5000));
  }

  var sites = [], sitenames = [];
  for (var i = 1; i < 3; i++) {
    const url = `https://api.stackexchange.com/2.2/users/${userid}/associated?filter=${filter}&key=${API_KEY}&pagesize=100&page=${i}`;
    const resp = await fetch(url);
    const items = await resp.json();
    const data = items.items.filter(x => x.reputation >= 350);
    data.forEach(v => {
      sites.push(v.site_url);
      sitenames.push(v.site_name);
    });
  }
  var queues = {};
  async function loop() {
    for (let i = 0; i < sites.length; i++) {
      const site = sites[i];
      const sitename = sitenames[i];
      queues = [];
      GM_xmlhttpRequest({
        method: 'GET',
        url: site + '/topbar/review',
        onload: async function(res) {
          const parsedHTML = new DOMParser().parseFromString(res.response, 'text/html');
          [...parsedHTML.querySelectorAll('.-item .v-visible-sr')].forEach(v => queues.push(v.previousElementSibling.innerHTML));
          if (queues.length) await notifyMe(queues.join(','), site, sitename);
        }
      });
    }
    await new Promise(x => setTimeout(x, 300000));
    loop();
  }
  loop();
})();