javascript - Wondering whats in this script causing it not to work in the new jquery update -


here link fiddle looking @ i'm looking for:

https://jsfiddle.net/mariusc23/s6mlj/31/

upon attempting apply own purposes realized not working @ all. came conclusion version using causing not work..

not javascript/ jquery buff wondering precisely in script causing not work jquery 3.0.0-rc1 instead older version jquery 1.10.2

// hide header on on scroll down var didscroll; var lastscrolltop = 0; var delta = 5; var navbarheight = $('header').outerheight();  $(window).scroll(function(event){     didscroll = true; });  setinterval(function() {     if (didscroll) {         hasscrolled();         didscroll = false;     } }, 250);  function hasscrolled() {     var st = $(this).scrolltop();      // make sure scroll more delta     if(math.abs(lastscrolltop - st) <= delta)         return;      // if scrolled down , past navbar, add class .nav-up.     // necessary never see "behind" navbar.     if (st > lastscrolltop && st > navbarheight){         // scroll down         $('header').removeclass('nav-down').addclass('nav-up');     } else {         // scroll         if(st + $(window).height() < $(document).height()) {             $('header').removeclass('nav-up').addclass('nav-down');         }     }      lastscrolltop = st; }


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