Laravel - check is user logedin with javascript

Maybe is stupid question but is possible to check is user loged in with javascript...

How to check is user loged in with javascript? I try:

$(document).ready(function() {

    $('#facebook').click(function(){
        window.open(this.href, "myWindowName", "width=800, height=600");
        return false;
        setInterval(function() {
            @if {{Auth::check()}};
alert('loged')
@else
alert('not loged')
@endif

        }, 5000);
    });
});

offcource this dont work... SO I need when I click on #facebook to check every 5 seconds is user logedin...

via Chebli Mohamed