let $ = require("jquery"); $(function() { $(window).on("scroll", function() { performUpdate(); }); $(window).on("navigate", function() { performUpdate(); }); window.setInterval(performUpdate, 500); }); function performUpdate() { if(window.scrollY < 15) { $(".topBar").addClass("homeBarTransparent"); } else { $(".topBar").removeClass("homeBarTransparent"); } }