<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>轮播图</title>
<style>
* {
margin:0;
padding:0;
}
a{
text-decoration: none;
}
.container {
position: relative;
width: 600px;
height: 400px;
margin:100px auto 0 auto;
box-shadow: 0 0 5px #FF3366;
overflow: hidden;
}
.container .wrap {
position: absolute;
width: 4200px;
height: 400px;
z-index: 1;
}
.container .wrap img {
float: left;
width: 600px;
height: 400px;
}
.container .buttons {
position: absolute;
right: 5px;
bottom:40px;
width: 150px;
height: 10px;
z-index: 2;
}
.container .buttons span {
margin-left: 5px;
display: inline-block;
width: 20px;
height: 20px;
border-radius: 50%;
background-color: #D4D4D4;
text-align: center;
color:white;
cursor: pointer;
}
.container .buttons span.on{
background-color: #FF3366;
}
.container .arrow {
position: absolute;
top: 35%;
color: #808080;
padding:0px 14px;
border-radius: 50%;
font-size: 50px;
z-index: 2;
display: none;
}
.container .arrow_left {
left: 10px;
}
.container .arrow_right {
right: 10px;
}
.container:hover .arrow {
display: block;
}
.container .arrow:hover {
background-color: rgba(0,0,0,0.2);
}
</style>
</head>
<body>
<div class="container">
<div class="wrap" style="left: -600px;">
<img src="./img/jd_app7.png" alt="">
<img src="./img/jd_app3.png" alt="">
<img src="./img/jd_app4.png" alt="">
<img src="./img/jd_app5.png" alt="">
<img src="./img/jd_app6.png" alt="">
<img src="./img/jd_app7.png" alt="">
<img src="./img/jd_app3.png" alt="">
</div>
<div class="buttons">
<span class="on">1</span>
<span>2</span>
<span>3</span>
<span>4</span>
<span>5</span>
</div>
<a href="javascript:;" class="arrow arrow_left"><</a>
<a href="javascript:;" class="arrow arrow_right">></a>
</div>
<script>
var wrap = document.querySelector(".wrap");
//左右箭头切换
var next = document.querySelector(".arrow_right");
var prev = document.querySelector(".arrow_left");
next.onclick = function () {
next_pic();
}
prev.onclick = function () {
prev_pic();
}
function next_pic () {
index++;
if(index > 4){
index = 0;
}
showCurrentDot();
var newLeft;
if(wrap.style.left === "-3600px"){
newLeft = -1200;
}else{
newLeft = parseInt(wrap.style.left)-600;
}
wrap.style.left = newLeft + "px";
}
function prev_pic () {
index--;
if(index < 0){
index = 4;
}
showCurrentDot();
var newLeft;
if(wrap.style.left === "0px"){
newLeft = -2400;
}else{
newLeft = parseInt(wrap.style.left)+600;
}
wrap.style.left = newLeft + "px";
}
//自动轮播
var timer = null;
function autoPlay () {
timer = setInterval(function () {
next_pic();
},2000);
}
autoPlay();
var container = document.querySelector(".container");
container.onmouseenter = function () {
clearInterval(timer);
}
container.onmouseleave = function () {
autoPlay();
}
//轮播图下方的小圆点点击切换图片
var index = 0;
var dots = document.getElementsByTagName("span");
function showCurrentDot () {
for(var i = 0, len = dots.length; i < len; i++){
dots[i].className = "";
}
dots[index].className = "on";
}
for (var i = 0, len = dots.length; i < len; i++){
(function(i){
dots[i].onclick = function () {
var dis = index - i;
if(index == 4 && parseInt(wrap.style.left)!==-3000){
dis = dis - 5;
}
//和使用prev和next相同，在最开始的照片5和最终的照片1在使用时会出现问题，导致符号和位数的出错，做相应地处理即可
if(index == 0 && parseInt(wrap.style.left)!== -600){
dis = 5 + dis;
}
wrap.style.left = (parseInt(wrap.style.left) + dis * 600)+"px";
index = i;
showCurrentDot();
}
})(i);
}
</script>
</body>
</html>
来源：CSDN
作者：LLLiiv
链接：https://blog.csdn.net/llllvvv/article/details/79928452