Michigan Campsite Watcher (Need Tampermonkey for Chrome)

gistfile1.txt

// ==UserScript==
// @name         Mi Campsite Watcher
// @namespace    https://www.midnrreservations.com/create-booking
// @version      0.1
// @description  try to take over the world!
// @author       You
// @match        https://www.midnrreservations.com/create-booking/*
// @grant        none
// ==/UserScript==

(function() {
    'use strict';
    const items = {...localStorage};
    Object.keys(items).forEach((key) => localStorage.removeItem(key));
    setTimeout(() => {
      const avail = document.getElementsByClassName("maplink available");
      if (avail.length) {
          notifyMe(avail.length + ' Sites available');
      }
    },5000)

    setTimeout(() => {
        window.location.reload();
    },180000);

})();


function notifyMe(text) {
  // Let's check if the browser supports notifications
  if (!("Notification" in window)) {
    alert("This browser does not support desktop notification");
  }

  // Let's check whether notification permissions have already been granted
  else if (Notification.permission === "granted") {
    // If it's okay let's create a notification
    var notification = new Notification(text);
  }

  // Otherwise, we need to ask the user for permission
  else if (Notification.permission !== "denied") {
    Notification.requestPermission().then(function (permission) {
      // If the user accepts, let's create a notification
      if (permission === "granted") {
        var notification = new Notification("Hi there!");
      }
    });
  }

  // At last, if the user has denied notifications, and you
  // want to be respectful there is no need to bother them any more.
}