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

Question

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...

Answer 1

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.

Answer 2

try this:

function fbLogoutUser() {
FB.getLoginStatus(function(response) {
    if (response && response.status === 'connected') {

        FB.logout(function(response) {
            document.location.reload();
        });
    } else if (response.status === 'not_authorized') 
        {
             FB.logout(function(response) {
            document.location.reload();
            });
        }
});}