Facebook autogrowth code for Facebook Tabs.

fb_autogrowth.html

<div id="fb-root"></div>
<script type="text/javascript">
    var goTo = true;
    function goToLogIn() {
        if (goTo) {
            self.location = "{{ path('facebook_security_check') }}";
        }
    }
    window.fbAsyncInit = function() {
        FB.init({
            appId: '{{ facebook_app_id }}',
            cookie: true,
            xfbml: true,
            oauth: true,
            status: false
        });
        FB.Event.subscribe('auth.statusChange', function(response) {
            setTimeout(goToLogIn, 500);
        });
        // FB.Canvas.setAutoGrow(true);
        if($('.in_fb').size()){
            var _fb_auto = {};
            _fb_auto.body        = $('body');
            _fb_auto.wr          = $('.main_centered_wr');
            _fb_auto.offset      = 0;
            _fb_auto.mt          = 0;
            setInterval(function(){
                // _fb_auto.body.height(_fb_auto.body.height() + _fb_auto.bg_offset);
                FB.Canvas.setSize({ width: 810, height: (_fb_auto.body.height() + _fb_auto.offset - _fb_auto.mt) });
            },500);
        }
    };
    (function() {
        var e = document.createElement('script');
        e.async = true;
        e.src = document.location.protocol + '//connect.facebook.net/en_US/all.js';
        document.getElementById('fb-root').appendChild(e);
    }());
</script>