$(window).on("scroll",function(){
var sctop=$(window).scrollTop();
if ($(window).scrollTop() >= $(document).height() -$(window).height()){
alert("到底了")
}
})
$(window).on("scroll",function(){
var sctop=$(window).scrollTop();
if ($(window).scrollTop() >= $(document).height() -$(window).height()){
alert("到底了")
}
})
原文：https://www.cnblogs.com/qq735675958/p/8341337.html