detect scroll

by lovromar

HTML

<div>blah</div>

CSS

div {
    height: 1000px;
}

JavaScript

(function () {
    var previousScroll = 0;
    
    $(window).scroll(function () {
       var currentScroll = $(this).scrollTop();
       if (currentScroll > previousScroll){
           alert('down');
       }
       else {
          alert('up');
       }
       previousScroll = currentScroll;
    });
}());