<!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>
</head>
<body>
<style>
* {
padding: 0;
margin: 0;
}
#box {
width: 1000px;
height: 200px;
margin: 50px auto;
border: 1px solid #000;
margin-top: 100px;
background-color: slategray;
overflow: hidden;
}
#ula {
list-style: none;
width: 8000px;
position: relative;
}
#box ul li {
float: left;
margin-right: 10px;
}
</style>
<div id="box">
<!-- ul 也有宽度和高度 -->
<ul id="ula">
<li><img src="img/1.jpg" alt=""></li>
<li><img src="img/2.jpg" alt=""></li>
<li><img src="img/3.jpg" alt=""></li>
<li><img src="img/4.jpg" alt=""></li>
<li><img src="img/5.jpg" alt=""></li>
</ul>
</div>
<script>
//无缝轮播图
var box = document.getElementById('box');
var ula = document.getElementById('ula');
//+5个li 列表
ula.innerHTML += ula.innerHTML;
//给left 标识符
var left = 0;
move();
//全局变量。
var setval;
function move() {
clearInterval(setval);
setval = setInterval(function() {
left -= 2;
if (left <= -1100) {
left = 0;
}
//给ula ul 给他一个left 的px 尺寸。
ula.style.left = left + 'px';
}, 20);
}
box.onmouseenter = function() {
clearInterval(setval);
}
box.onmouseleave = function() {
move();
}
</script>
</body>
</html>