storage-event.js

init: function() {
  var callback = this._handleStorageEvent.bind(this);
  $(window).on('storage', callback);
}

_handleStorageEvent: function(event) {
  var storageEvent = event.originalEvent;

  var storageKey = storageEvent.key;
  var tokens = storageKey.split(':');
  var namespace = tokens[0];
  var key = tokens[1];

  if (key && namespace === this.get('namespace')) {
   this.notifyPropertyChange(key);
  }
}