$(document).ready(function() {
  // fix menu when passed
  $('.masthead').visibility({
    once: false,
    onBottomPassed: function() {
      $('.fixed.menu').transition('fade in');
    },
    onBottomPassedReverse: function() {
      $('.fixed.menu').transition('fade out');
    },
  });

  // create sidebar and attach to menu open
  $('.ui.sidebar').sidebar('attach events', '.toc.item');
});
