Newer watch based API for Drupal module

browserid.js

(function ($) {
    // currentUser is null or '[email protected]'
    var currentUser = "<?= loggedInUser ?>",
        handleLogin,
        handleLogout;

    handleLogin = function (assertion) {
        if (assertion) {
            $.post(Drupal.settings.basePath +'index.php?q=browserid/verify', {
                'assertion': assertion,
                'token': Drupal.settings.browserid.token
            }, function (data) {           
                if (data.reload) {
                    window.location.reload();
                }
                else if (data.destination) {
                    window.location.href = data.destination;
                }
                else {
                    alert(Drupal.t('An unknown error occurred while attempting to validate your BrowserID login. After clicking "OK," you will be redirected to a page where you can log in without BrowserID or try logging in with BrowserID again.'));
                    window.location.href = Drupal.settings.basePath + 'index.php?q=user/login';
                }
            });
        }
    };

    handleLogout = function () {
      window.location.href = Drupal.settings.basePath + 'index.php?q=user/logout';  
    };

    navigator.id.watch({
        loggedInEmail: currentUser,
        onlogin: handleLogin,
        onlogout: handleLogout,
        onready: function () {
            $(context).find('.browserid-button').show();
            $(context).find('.browserid-button').click(function(e) {performLogin()});
        }
    });
})(jQuery);