监控滚动条，实时获取滚动条的位置信息 jq查看滚动条在当前页面的百分比不停加载数据

[本文已参与「新人创作礼」活动，一起开启掘金创作之路。]

window.addEventListener("scroll",function(e){
  var h =document.documentElement.scrollTop||document.body.scrollTop;
  console.log(h)
  if(h <= 0){
    alert("到顶部了")
  }
});

jq根据滚动条百分比不停地加载数据

$(window).scroll(function(){
                var scrollTo = $(window).scrollTop(),
                    docHeight = $(document).height(),
                    windowHeight = $(window).height();
                scrollPercent = (scrollTo / (docHeight-windowHeight)) * 100;
                scrollPercent = scrollPercent.toFixed(1);
                console.log(scrollPercent+"%")
                //请求数据
                if(scrollPercent>90){
                    ty_videoXJCKD(numbers+=10)
                }
            }).trigger('scroll');

var numbers = 10;
function ty_videoXJCKD (numbers){
        var lis = '';
        for (var i = 0; i<newsData.length; i++){
            if(i<=numbers){
                lis+='<li>'+
                    '<a href="'+newsData[i].href+'">' +
                    '<div class="fl jingcai_l">'+
                    '<img class="lazy" data-original="'+newsData[i].img+'"  alt="">'+
                    '</div>'+
                    '<div class="fl jingcai_r">'+
                    '<span class="jingcai_title">'+newsData[i].title+'</span>'+
                    '<p class="">'+
                    '<span style="margin-right: 12px;">'+newsData[i].name+'</span>'+
                    '<span>'+newsData[i].date+'</span>'+
                    '</p>'+
                    '</div>'+
                    '</a>'+
                    '</li>'
            }
 
        }
        $("#jingcaiKD").html(lis)
        imgLoad ()
};