<!DOCTYPE html>
<html lang="en">
<head>
???<meta charset="UTF-8">
???<title>Title</title>
???<style>
???????.container{
???????????width: 500px;
???????????height: 300px;
???????????position: relative;
???????????border: 1px solid red;
???????}
???????.img-content{
???????????width: 500px;
???????????height: 300px;
???????}
???????.point{
???????????position: absolute;
???????????left: 30%;
???????????bottom: 5%;
???????????list-style: none;
???????}
???????.point>li{
???????????width: 20px;
???????????height: 20px;
???????????float: left;
???????????margin-left: 10px;
???????????border: 1px solid red;
???????????border-radius: 50%;
???????????line-height: 20px;
???????????text-align: center;
???????}
???????.left{
???????????width: 50px;
???????????height: 30px;
???????????position: absolute;
???????????top: 40%;
???????????left: 10%;
???????????border: 1px solid red;
???????}
???????.right{
???????????width: 50px;
???????????height: 30px;
???????????position: absolute;
???????????top: 40%;
???????????right: 10%;
???????????border: 1px solid red;
???????}
???????.img-content>img{
???????????display: none;
???????}
???????.img-content>img:nth-child(1){
???????????display: inline-block;
???????}
???</style>
</head>
<body>
<div class="container">
???<div class="img-content">
???????<img src="img/f1.jpg" >
???????<img src="img/f2.jpg" >
???????<img src="img/f3.jpg" >
???</div>
???<ul class="point">
???????<li>1</li>
???????<li>2</li>
???????<li>3</li>
???</ul>
???<div class="left">
???????<
???</div>
???<div class="right">
???????>
???</div>
</div>
<script>
???/*获取dom元素*/
???var img=document.querySelectorAll(".img-content>img");
???var li=document.querySelectorAll(".point>li");
???var left=document.getElementsByClassName("left")[0];
???var right=document.getElementsByClassName("right")[0];
???var container=document.getElementsByClassName("container")[0];
???var index=0;
???var timer=setInterval(slide,2000);//定义一个计时器
???function slide(){
???????for(var i=0;i<img.length;i++){
???????????img[i].style.display="none";//先将所有的图片都隐藏
???????}
???????img[index].style.display="inline-block";//再显示其中一张
???????index++;
???????if(index==img.length){
???????????index=0;//当显示到最后一张时，在回到第一张
???????}
???}
???container.onmouseover=function(){
???????clearInterval(timer);//清楚计时器
???};
???container.onmouseout=function(){
???????timer=setInterval(slide,2000);//再次启用计时器，记住此处一定不要再用var
???};
???var arr=[];//定义一个数组
???for(var i=0;i<li.length;i++){
???????arr.push(li[i]);//将每个添加到数组内
???????li[i].addEventListener("click",function(){//利用循环给每个li绑定点击事件
???????????var index1=arr.indexOf(this);//获取当前点击事件的对象也就是this在arr中的下标，然后再显示当前下标的图片；
???????????console.log(index1);
???????????for(var j=0;j<img.length;j++){
???????????????img[j].style.display="none";//先用循环将每张图片隐藏
???????????}
???????????img[index1].style.display="inline-block";//显示这个下标的图片
???????})
???}
???/*right.addEventListener("click", function () {
???????var arr1=[];
???????for(var i=0;i<img.length;i++){
???????????//arr1.push(getComputedStyle(img[i])[‘display‘]);
???????????if(getComputedStyle(img[i])[‘display‘]=="inline-block"){
???????????????img[i+1].style.display="inline-block";
???????????????if(i>=img.length){
???????????????????img[0].style.display="inline-block";
???????????????}
???????????}
???????}
???????console.log(arr1);
???})*/
</script>
</body>
</html>
原生js实现轮播
原文地址：http://www.cnblogs.com/mark20170707/p/7468114.html