Poppa on specific node

poppa-on-node.js

$('header').poppa({
  'li': function (li) {
    // $('header').find('li') 
    // is accessible within this function as li
  },
  'a:first-of-type': function (a) {
    // $('header').find('a:first-of-type') 
    // is accessible within this function as a
  }
});