initFacebook.js

window.fbAsyncInit = function () {
    FB.init({
        appId: '1423043987951286',
        status: true, // check login status
        cookie: true, // enable cookies to allow the server to access the session
        xfbml: true  // parse XFBML
    });


//          FB.getLoginStatus(function(response){
//            if (loginStatus == false && response.status == "connected") {
//                loginStatus = true;
//                window.location = "/profile";
//            }
//          });


    // Here we subscribe to the auth.authResponseChange JavaScript event. This event is fired
    // for any authentication related change, such as login, logout or session refresh. This means that
    // whenever someone who was previously logged out tries to log in again, the correct case below
    // will be handled.
    FB.Event.subscribe('auth.authResponseChange', function (response) {
        // Here we specify what we do with the response anytime this event occurs.
        if (response.status === 'connected') {
            // The response object is returned with a status field that lets the app know the current
            // login status of the person. In this case, we're handling the situation where they
            // have logged in to the app.

            testAPI();
            initTestApp(FB.getAccessToken());

        } else if (response.status === 'not_authorized') {
            // In this case, the person is logged into Facebook, but not into the app, so we call
            // FB.login() to prompt them to do so.
            // In real-life usage, you wouldn't want to immediately prompt someone to login
            // like this, for two reasons:
            // (1) JavaScript created popup windows are blocked by most browsers unless they
            // result from direct interaction from people using the app (such as a mouse click)
            // (2) it is a bad experience to be continually prompted to login upon page load.
            FB.login();
        } else {
            // In this case, the person is not logged into Facebook, so we call the login()
            // function to prompt them to do so. Note that at this stage there is no indication
            // of whether they are logged into the app. If they aren't then they'll see the Login
            // dialog right after they log in to Facebook.
            // The same caveats as above apply to the FB.login() call here.
            FB.login();
            console.log('is this happening');
        }
    });

};

// Load the SDK asynchronously
(function (d) {
    var js, id = 'facebook-jssdk', ref = d.getElementsByTagName('script')[0];
    if (d.getElementById(id)) {
        return;
    }
    js = d.createElement('script');
    js.id = id;
    js.async = true;
    js.src = "//connect.facebook.net/en_US/all.js";
    ref.parentNode.insertBefore(js, ref);
}(document));

// Here we run a very simple test of the Graph API after login is successful.
// This testAPI() function is only called in those cases.
function testAPI() {
    console.log('Welcome!  Fetching your information.... ');
    FB.api('/me', function (response) {
        console.log('Good to see you, ' + response.name + '.');
    });
}