<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<script src="./js/jquery-3.6.0.js"></script>
<style>
#gotop{
40px;
height:40px;
background-color: gray;
color:white;
text-align:center;
line-height:40px;
position:fixed;
right:20px;
top:300px;
cursor: pointer;
}
body{
height:3000px;
}
</style>
<script>
$(function(){
$("#gotop").click(function(){
// 瞬间回到顶部
$("html").scrollTop(0);
})
})
</script>
</head>
<body>
<div id="gotop">顶部</div>
</body>
</html>
