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/***
* 监听滚动事件,判断滚动方向
*
***/
var Before_scollH = 0;
$(window).on('scroll', function () {
var After_scollH = $(window).scrollTop();
var differH = After_scollH - Before_scollH;
if (differH == 0) {
return false;
}
var scollType = differH > 0 ? 'down' : 'up';
Before_scollH = After_scollH;
console.log("type", Before_scollH, After_scollH, scollType);
})