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服务器之家。
原文链接：https://blog.csdn.net/weixin_54741536/article/details/114499250