本文实例为大家分享了js实现幻灯片轮播图的具体代码，供大家参考，具体内容如下
1.html
选取了五张图片 放入div中，然后是左右箭头，以及按钮，代码如下
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>轮播图</title>
<link href="../css/轮播图.css" rel="stylesheet">
</head>
<body>
<div id="box">
<img src="../image/car-1.jpg">
<img src="../image/car-2.jpg">
<img src="../image/car-3.jpg">
<img src="../image/car-4.jpg">
<img src="../image/car-5.jpg">
<div class="arrow">
<a class="left" href="javacript:void(0);" ><</a>
<a class="right" href="javacript:void(0);" >></a>
</div>
<ul class="btn">
<li class="on" slideIndex="1">1</li>
<li slideIndex="2">2</li>
<li slideIndex="3">3</li>
<li slideIndex="4">4</li>
<li slideIndex="5">5</li>
</ul>
</div>
<script src="../js/轮播图.js">
</script>
</body>
</html>
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2.css给div设置居中
将所有图片隐藏，设置箭头和小圆点的样式
代码如下
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*{
margin:0;
padding:0;
text-decoration: none;
list-style: none;
}
#box{
width:800px;
height: 500px;
margin:50px auto 0px;
position: relative;
}
#box img{
width:800px;
height: 500px;
display: none;
animation:fade 3s;
}
#box .arrow{
width:800px;
height: 80px;
position: absolute;
top:50%;
margin-top: -40px;
}
#box .arrow .left,.right{
display: inline-block;
line-height: 80px;
width: 50px;
height:80px;
}
#box .arrow .left:hover{
background:rgba(0,0,0,0.8);
}
#box .arrow .right:hover{
background:rgba(0,0,0,0.8);
}
#box .arrow .right{
text-align: right;
position: absolute;
right:0;
}
#box .arrow a{
font-size: 50px;
color: #ffffff;
}
#box .btn{
position: absolute;
bottom: 10px;
left:50%;
margin-left: -98.47px;
text-align: center;
}
#box .btn li{
text-align: center;
margin:0 5px;
padding: 10px;
float:left;
background:white;
border-radius:20%;
cursor: pointer;
transition: background 2s ease;
}
#box .btn .on{
background: #000;
color:white;
}
@keyframes fade{
from{
opacity:.4;
}
to{
opacity:1;
}
}
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3.js部分
js设定让当前图片显示display：block，其他图片隐藏display：none；
js代码如下
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window.onload=function () {
var left=document.getElementsByClassName("left")[0];
var right=document.getElementsByClassName("right")[0];
var btn=document.getElementsByClassName("btn")[0].getElementsByTagName("li");
var box=document.getElementById("box");
var slideIndex=1;
var index=1;
var timer;
//图片切换函数
showSlides(slideIndex);
function showSlides(n) {
var slides=document.getElementById("box").getElementsByTagName("img");
for(var i=0;i<slides.length;i++){
slides[i].style.display="none";
btn[i].className="";
}
slides[slideIndex-1].style.display="block";
btn[slideIndex-1].className="on"
}
//箭头切换
left.onclick=function () {
if(slideIndex>1) {
slideIndex--;
showSlides(slideIndex);
}else {
slideIndex=5;
showSlides(slideIndex);
}
}
right.onclick=function () {
if(slideIndex<5) {
slideIndex++;
showSlides(slideIndex);
}else {
slideIndex=1;
showSlides(slideIndex);
}
}
//btn切换
for(var i=0;i<btn.length;i++){
btn[i].onclick=function () {
var myslideIndex=this.getAttribute('slideIndex');
// var myindex=parseInt(this.getAttribute("index"));
slideIndex=myslideIndex;
showSlides(slideIndex);
}
}
//自动播放
function play() {
timer=setInterval(function () {
right.onclick();
},4000);
}
function stop() {
clearInterval(timer);
}
box.onmouseout=play;
box.onmouseover=stop;
play();
}
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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_45596380/article/details/105929563