flashing alert

[khalil]

If you reference $('.alert') further in the code this means that all elements with alert class will be flashed if at least one objects is set to true. So it won't work for multiple/different alert objects. Try this (not tested):

Code:

$(function() {
  $('.alert').each(function(_, el) {
    var $el = $(el);
    var addr = $el.data('object');
    var timer;

    if (addr) {
      grp.listen(addr, function(obj) {
        if (obj.value) {
          if (!timer) {
            timer = setInterval(function() {
              $el.toggleClass('hide');
            }, 500);
          }
        }
        else {
          $el.removeClass('hide');
          clearInterval(timer);
          timer = null;
        }
      });
    }
  });
});

That's right, I didn't notice that because I tested it on one object

your script seems to work fine, I tested it for two objects and work fine