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FB.logout() called without an access token. javascript sdk

rated 0 times [ 25] [ 4] / answers: 1 / hits: 30621 / 11 Years ago, thu, november 7, 2013, 12:00:00

Totally lost on this and docs don't really give any insight on this...

Using the Facebook Javascript SDK in my app with this login button code:

<fb:login-button scope=manage_pages,read_insights,ads_management autologoutlink=true size=large></fb:login-button>

As per the docs, autologoutlink=true param turns the login button to log out once the user is logged in. I want to keep this functionality and not write my own button code

This event calls FB.logout but still returns the error message in the callback

FB.Event.subscribe('auth.logout', function(response) {                                              

    FB.logout(function(response) {

        // FB.logout() called without an access token.

    });

});

I would like to use the Facebook Login Widget and not my own button for login, so the other answers on the same subject don't help. I don't understand how I'm supposed to pass the access_token to prove I'm authorized to logout...

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juancarlos

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3 Years ago

answered 11 Years ago tylerdamiena · Accepted Answer

Apparently this isn't possible, at least in no way I can figure out. Quick solution is call this function from a custom Log Out button:

function fbLogoutUser() {

    FB.getLoginStatus(function(response) {

        if (response && response.status === 'connected') {

            FB.logout(function(response) {

                document.location.reload();

            });

        }

    });

}

The page reload makes another request to Facebook which then sees the unauthorized state and removes the cookie from the browser which in turn invalidates the access_token. So this logs out the user from the site and from Facebook.