localStorage-event-bus.js

window.addEventListener('storage', function(e) {
  if (e.storageArea === localStorage) {
    var key = e.key;
    if (data) {
      $(document).trigger('storage.' + e.key, data);
    }
  }
});

$(document).on("storage.test", function(e, data) {
  console.log("event fired with data", data);
});

// run this in another browser window/tab
localStorage.setItem("test", "it worked");