HTML：
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>轮播图</title>
<link rel="stylesheet" href="style.css">
</head>
<body>
<div class="container">
<div class="tupian">
<img src="图片路径" alt="5">
<img src="图片路径" alt="1">
<img src="图片路径" alt="2">
<img src="图片路径" alt="3">
<img src="图片路径" alt="4">
<img src="图片路径" alt="5">
<img src="图片路径" alt="1">
</div>
<div class="buttons">
<span class="on"></span>
<span></span>
<span></span>
<span></span>
<span></span>
</div>
<a href="javascript:void (0);" rel="external nofollow" class="arrow arrow_left"></a>
<a href="javascript:void (0);" rel="external nofollow" class="arrow arrow_right"></a>
</div>
<script src="carousel.js"></script>
</body>
</html>
css：
*{
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 rgb(180, 182, 180);
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:30px;
width: 120px;
height: 10px;
z-index: 2;
}
.container .buttons span {
margin-left: 5px;
display: inline-block;
width: 12px;
height: 12px;
border-radius: 50%;
background-color: rgb(211, 212, 211);
text-align: center;
color:white;
cursor: pointer;
}
.container .buttons span.on{
background-color: rgb(151, 150, 150);
}
.container .arrow {
position: absolute;
top: 40%;
color: rgb(179, 182, 179);
padding:0px 15px;
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);
}
js:
// 下一页
function next_pic(wrap) {
index++;
if (index > 4) {
index = 0;
}
showCurrentDot(wrap);
var newLeft;
if (wrap.style.left === "-3600px") {
newLeft = -1200;
} else {
newLeft = parseInt(wrap.style.left) - 600;
}
wrap.style.left = newLeft + "px";
}
// 上一页
function prev_pic(wrap) {
index--;
if (index < 0) {
index = 4;
}
showCurrentDot(wrap);
var newLeft;
if (wrap.style.left === "0px") {
newLeft = -2400;
} else {
newLeft = parseInt(wrap.style.left) + 600;
}
wrap.style.left = newLeft + "px";
}
// 定时器 --- 自动播放
let timer = null;
function autoPlay(wrap) {
timer = setInterval(function () {
next_pic(wrap);
}, 2000);
}
// 圆点导航
let index = 0;
let dots = document.getElementsByTagName("span");
// 显示当前是第几张图片
function showCurrentDot(wrap) {
for (var i = 0, len = dots.length; i < len; i++) {
dots[i].className = "";
}
dots[index].className = "on";
}
//最开始和最后的照片修整
for (var i = 0, len = dots.length; i < len; i++) {
(function (i) {
let wrap = document.querySelector(".wrap");
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(wrap);
}
})(i);
}
function init() {
var wrap = document.querySelector(".wrap");
var next = document.querySelector(".arrow_right");
var prev = document.querySelector(".arrow_left");
// 当鼠标点击上下箭头
next.onclick = function () {
next_pic(wrap);
}
prev.onclick = function () {
prev_pic(wrap);
}
//启动定时器
autoPlay(wrap);
// 鼠标滑过 取消自动播放
var container = document.querySelector(".container");
container.onmouseenter = function () {
clearInterval(timer);
}
container.onmouseleave = function () {
autoPlay(wrap);
}
}
window.addEventListener('load', init, false);
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