login button login button

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

<script>
document.getElementById('fb-login').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');
    }
  });
};
</script>

Login