var tempScrollTop, currentScrollTop = 0; 

$(window).scroll(function(){ 

   currentScrollTop = $("#div").scrollTop(); 

   if (tempScrollTop > currentScrollTop ) {
       // upscroll code
   }
  else if (tempScrollTop < currentScrollTop ){
      // downscroll code
  }

  tempScrollTop = currentScrollTop; 
} 

或者使用鼠标滚轮扩展，见这里。

这是在用户结束滚动时检测方向的最佳解决方案。

var currentScrollTop = 0 ;

$(window).bind('scroll', function () {     

    scrollTop = $(this).scrollTop();

    clearTimeout($.data(this, 'scrollTimer'));
    $.data(this, 'scrollTimer', setTimeout(function() {

        if(scrollTop > currentScrollTop){
            // downscroll code
            $('.mfb-component--bl').addClass('mfbHide');
        }else{
            // upscroll code
            $('.mfb-component--bl').removeClass('mfbHide');
        }
        currentScrollTop = scrollTop;

    }, 250));

});

保持超级简单:

jQuery事件监听器

$(window).on('wheel', function(){
  whichDirection(event);
});

香草JavaScript事件监听器

if(window.addEventListener){
  addEventListener('wheel', whichDirection, false);
} else if (window.attachEvent) {
  attachEvent('wheel', whichDirection, false);
}

功能不变:

function whichDirection(event){
  console.log(event + ' WheelEvent has all kinds of good stuff to work with');
  var scrollDirection = event.deltaY;
  if(scrollDirection === 1){
    console.log('meet me at the club, going down', scrollDirection);
  } else if(scrollDirection === -1) {
    console.log('Going up, on a tuesday', scrollDirection);
  }
}

我在这里写了一篇更深入的文章 ​​​​​​​

You can use this as well $(document).ready(function(){ var currentscroll_position = $(window).scrollTop(); $(window).on('scroll', function(){ Get_page_scroll_direction(); }); function Get_page_scroll_direction(){ var running_scroll_position = $(window).scrollTop(); if(running_scroll_position > currentscroll_position) { $('.direction_value').text('Scrolling Down Scripts'); } else { $('.direction_value').text('Scrolling Up Scripts'); } currentscroll_position = running_scroll_position; } }); .direction_value{ position: fixed; height: 30px; background-color: #333; color: #fff; text-align: center; z-index: 99; left: 0; top: 0; width: 100%; } <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script> <div class="direction_value"> </div> <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Nisi ducimus expedita facilis architecto fugiat veniam natus suscipit amet beatae atque, enim recusandae quos, magnam, perferendis accusamus cumque nemo modi unde!</p> <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Nisi ducimus expedita facilis architecto fugiat veniam natus suscipit amet beatae atque, enim recusandae quos, magnam, perferendis accusamus cumque nemo modi unde!</p> <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Nisi ducimus expedita facilis architecto fugiat veniam natus suscipit amet beatae atque, enim recusandae quos, magnam, perferendis accusamus cumque nemo modi unde!</p> <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Nisi ducimus expedita facilis architecto fugiat veniam natus suscipit amet beatae atque, enim recusandae quos, magnam, perferendis accusamus cumque nemo modi unde!</p> <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Nisi ducimus expedita facilis architecto fugiat veniam natus suscipit amet beatae atque, enim recusandae quos, magnam, perferendis accusamus cumque nemo modi unde!</p> <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Nisi ducimus expedita facilis architecto fugiat veniam natus suscipit amet beatae atque, enim recusandae quos, magnam, perferendis accusamus cumque nemo modi unde!</p>

检查当前的scrollTop和之前的scrollTop

var lastScrollTop = 0;
$(window).scroll(function(event){
   var st = $(this).scrollTop();
   if (st > lastScrollTop){
       // downscroll code
   } else {
      // upscroll code
   }
   lastScrollTop = st;
});

为什么没有人使用滚动的jQuery返回的事件对象?

$window.on('scroll', function (event) {
    console.group('Scroll');
    console.info('Scroll event:', event);
    console.info('Position:', this.pageYOffset);
    console.info('Direction:', event.originalEvent.dir); // Here is the direction
    console.groupEnd();
});

我使用铬，我没有检查其他浏览器，如果他们有dir属性。