javascript 获取滚动方向Jquery滚动功能

Posted 2021-05-04

ls = 0, delta = 5;

var st = $(this).scrollTop();
                
if (Math.abs(ls - st) <= delta) return;

if (st > ls) {
    // scrolling down
    scroll_dir = false;
} else {
    // scrolling up
    scroll_dir = true;
}
ls = st;