Lungo2.0.js/example/app/events.pull.js

var pull_example = new Lungo.Element.Pull('section#pull article', {
    onPull: "Pull down to refresh",
    onRelease: "Release to get new data",
    onRefresh: "Refreshing...",
    callback: function() {
        alert("Pull & Refresh completed!");
        pull_example.hide();
    }
});