window.onscroll=function(){ //滚动条上端距离顶部的距离 var scrollTop = document.documentElement.scrollTop||document.body.scrollTop; //是可视区的高度 var windowHeight = document.documentElement.clientHeight || document.body.clientHeight; //是滚动条的总高度(当前可滚动的页面的总高度) var scrollHeight = document.documentElement.scrollHeight||document.body.scrollHeight; //滚动条到底部时触发 if(scrollTop+windowHeight>=scrollHeight){ console.log('滚动到底部') } }