Issue #3315677: Uncaught ReferenceError: FALSE is not defined

  Drupal.behaviors.antibot = {

    attach: function (context) {

      // Assume the user is not human, despite JS being enabled.

      drupalSettings.antibot.human = FALSE;

      drupalSettings.antibot.human = false;

      // Wait for a mouse to move, indicating they are human.

      document.body.addEventListener('mousemove', function () {

        });

      }

      // Mark this user as being human.

      drupalSettings.antibot.human = TRUE;

      drupalSettings.antibot.human = true;

    }

  };

})(Drupal, drupalSettings);