SO - 20509886

by Arun P Johny

HTML

<div class="notify"></div>

JavaScript

var flag;
$('html').on('mousewheel DOMMouseScroll', function (e) {
    var delta = e.originalEvent.wheelDelta || e.originalEvent.detail;

    if (flag != 1 && delta < 0) {
        flag = 1;
        $(".notify").append("<p>You scrolled down</p>");
    } else if (flag != 2 && delta > 0) {
        flag = 2;
        $(".notify").append("<p>You scrolled up</p>");
    }
});