login and logout login and logout

<button class="btn btn-success" id="fb-auth">Login</button>

<script>
function updateButton(response) {
  Log.info('Updating Button', response);
  var button = document.getElementById('fb-auth');

  if (response.status === 'connected') {
    button.innerHTML = 'Logout';
    button.className = 'btn btn-danger';
    button.onclick = function() {
      FB.logout(function(response) {
        Log.info('FB.logout callback', response);
      });
    };
  } else {
    button.innerHTML = 'Login';
    button.className = 'btn btn-success';
    button.onclick = function() {
      FB.login(function(response) {
        Log.info('FB.login callback', response);
        if (response.status === 'connected') {
          Log.info('User is logged in');
        } else {
          Log.info('User is logged out');
        }
      });
    };
  }
}


FB.getLoginStatus(updateButton);
FB.Event.subscribe('auth.statusChange', updateButton);
</script>

 

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