https://www.janvanas.nl/static/themes/cloudsuite_responsive/js/includes/offline-mode-es5.js?q=1594826697

1function OfflineMode() {
2  let connection = window.navigator.onLine;
3  const elements = {
4    messages: document.querySelectorAll('[data-offline-message]'),
5    disabling: document.querySelectorAll('[data-offline-disabling]')
6  };
7
8  function set() {
9    document.body.dataset.offlineMode = "" + !connection + "";
10    window.onbeforeunload = null;
11
12    if (!connection) {
13      window.onbeforeunload = function() {
14        return js_translations['offline_mode'];
15      };
16
17      $.notify({
18        message: "" + js_translations['offline_mode'] + ""
19      }, {
20        type: 'info',
21        placement: {
22          from: 'bottom',
23          align: 'right'
24        }
25      });
26    }
27
28    elements.messages.forEach(function(message) {
29      message.style.display = connection ? 'none' : 'block';
30    });
31    elements.disabling.forEach(function(disable) {
32      if (
33        disable.getAttribute('data-offline-disabling') !== 'disabled' ||
34        disable.getAttribute('data-offline-disabling-temporary')
35      ) {
36        disable.removeAttribute('disabled');
37      }
38
39      if (!connection) {
40        disable.setAttribute('disabled', 'disabled');
41      }
42    });
43  }
44
45  function watcher() {
46    set();
47
48    window.addEventListener('offline', function() {
49      connection = false;
50      set();
51    });
52    window.addEventListener('online', function() {
53
54      connection = true;
55      set();
56    });
57  }
58
59  watcher();
60}
61
62OfflineMode();