本文实例为大家分享了js实现轮播图效果的具体代码，供大家参考，具体内容如下
1、html部分
<div id="box">
<ul>
<li class="show"><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>
<li><img src="img/6.jpg" alt=""></li>
</ul>
<img src="img/l.png" alt="" id="lef">
<img src="img/r.png" alt="" id="rig">
<ol>
<li class="focus" data-i = "0"></li>
<li data-i = "1"></li>
<li data-i = "2"></li>
<li data-i = "3"></li>
<li data-i = "4"></li>
<li data-i = "5"></li>
</ol>
</div>2、js部分
<script>
var liList = document.querySelectorAll("#box ul li")
var olList = document.querySelectorAll("#box ol li")
var rig = document.getElementById("rig")
var lef = document.getElementById("lef")
var index = 0
function setLi(){
for(var i = 0;i <liList.length;i++){
liList[i].className = ""
olList[i].className = ""
}
liList[index].className = "show"
olList[index].className = "focus"
}
// 向右
rig.onclick = function(){
if(index !== 5){
index++
}
if(index === 5){
index = 0
}
setLi()
}
//向左
lef.onclick = function(){
if(index !== 0){
index--
}
if(index === 0){
index = 5
}
setLi()
}
//圆点
for(var i = 0;i < olList.length;i++){
olList[i].onclick = function(){
index = this.getAttribute("data-i")
setLi()
}
}
//计时
var autoPlay = setInterval(
function(){
rig.click()
},3000)
//鼠标划上停止播放
var box = document.querySelector("div")
box.onmouseenter = function(){
clearInterval(autoPlay)
}
// 鼠标移走继续播放
box.onmouseleave = function(){
autoPlay = setInterval(
function(){
rig.click()
},3000)
}
</script>以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持编程网。
