我试过很多次，但不能在每三个向下滚动后自动添加显示更多按钮。
当我要到页面底部时，它向下滚动无限次。我必须在滚动三次后停止它，并在每滚动三次后添加"查看更多"按钮。
试试这样:
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<!DOCTYPE html>
<html>
<head>
<style>
body {
width: 200px;
height: 100px;
overflow: scroll;
}
</style>
</head>
<body >
<p>Try the scrollbar in div.</p>
In my younger and more vulnerable years my father gave me some advice that I've been turning over in my mind ever since.
<br><br>
'Whenever you feel like criticizing anyone,' he told me, just remember that all the people in this world haven't had the advantages that you've had.'
<p>Try the scrollbar in div.</p>
In my younger and more vulnerable years my father gave me some advice that I've been turning over in my mind ever since.
<br><br>
'Whenever you feel like criticizing anyone,' he told me, just remember that all the people in this world haven't had the advantages that you've had.'
<p>Try the scrollbar in div.</p>
In my younger and more vulnerable years my father gave me some advice that I've been turning over in my mind ever since.
<br><br>
'Whenever you feel like criticizing anyone,' he told me, just remember that all the people in this world haven't had the advantages that you've had.'
<p>Try the scrollbar in div.</p>
In my younger and more vulnerable years my father gave me some advice that I've been turning over in my mind ever since.
<br><br>
'Whenever you feel like criticizing anyone,' he told me, just remember that all the people in this world haven't had the advantages that you've had.'
<p>Scrolled <span id="demo">0</span> times.</p>
<script>
var lastScrollTop = 0;
var x = 0;
$(window).scroll(function(event){
var st = $(this).scrollTop();
if (st > lastScrollTop){
document.getElementById("demo").innerHTML = x += 1;
if( x%3 == 0){
var i=document.createElement('button');
i.innerHTML="more";
document.getElementsByTagName('body')[0].appendChild(i);
}
}
lastScrollTop = st;
});
</script>
</body>
</html>