window addeventlistener 28 22online 22 29 3b

1window.addEventListener('load', function() {
2  var status = document.getElementById("status");
3  var log = document.getElementById("log");
4
5  function updateOnlineStatus(event) {
6    var condition = navigator.onLine ? "online" : "offline";
7
8    status.className = condition;
9    status.innerHTML = condition.toUpperCase();
10
11    log.insertAdjacentHTML("beforeend", "Event: " + event.type + "; Status: " + condition);
12  }
13
14  window.addEventListener('online',  updateOnlineStatus);
15  window.addEventListener('offline', updateOnlineStatus);
16});