<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title></title>
<style>
body {
height: 3000px;
}
.progress {
position: fixed;
left: 0;
top: 0;
100%;
height: 2px;
}
.con {
position: absolute;
left: 0;
top: 0;
0;
height: 2px;
}
</style>
</head>
<body id='body'>
<div class="progress">
<div class="con" id="con"></div>
</div>
<script type="text/javascript">
let conWidth = document.getElementById("con");
var clientHeight = getClientHeight();
window.onscroll = function() {
//获取当前滚动条的位置
var top = document.documentElement.scrollTop;
let scrHeight = document.documentElement.scrollHeight;
let wheight = scrHeight- clientHeight;
let width = Math.round(top*100 / wheight);
conWidth.style.width = width + '%'
}
console.log(clientHeight,"kkkkkk")
function getClientHeight() {
var clientHeight = 0;
if (document.body.clientHeight && document.documentElement.clientHeight) {
var clientHeight = (document.body.clientHeight < document.documentElement.clientHeight) ? document.body
.clientHeight : document.documentElement.clientHeight;
} else {
var clientHeight = (document.body.clientHeight > document.documentElement.clientHeight) ? document.body
.clientHeight : document.documentElement.clientHeight;
}
return clientHeight;
}
</script>
</body>
</html>