纯原生javascript手写轮播图案列代码，欢迎交流学习
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>轮播图</title>
<style>
* {
margin: 0px;
padding: 0px;
}
body {
display:flex;
justify-content: center;
align-items:center;
height: 100vh;
}
.box {
position: relative;
width: 800px;
height: 433px;
overflow: hidden;
background: #fff;
white-space: nowrap;
}
.image {
width: 800px;
height: 400px;
}
.image li {
list-style: none;
overflow: hidden;
position: absolute;
display: none;
}
.num {
height: 30px;
width: 400px;
margin-left: 60%;
transform: translateX(-50%);
overflow: hidden;
margin-top: -32px;
z-index: 1;
}
.num li {
width: 30px;
height: 30px;
background: #fff;
float: left;
list-style: none;
font-size: 28px;
margin: 0px 7px;
border-radius: 50%;
cursor: pointer;
text-align: center;
z-index: 2;
}
.active {
display: block;
}
.arrow{
height: 60px;
width: 30px;
position: absolute;
cursor: pointer;
background-color: black;
color: white;
opacity: 0.5;
font-size: 20px;
text-align: center;
line-height: 60px;
top: 197px;
z-index: 6;
}
.left{
left: 0;
}
.right{
right: 0;
}
</style>
</head>
<body>
<div class="box">
<ul class="image">
<li><img src="images/1.png" alt=""></li>
<li><img src="images/2.png" alt=""></li>
<li><img src="images/3.png" alt=""></li>
<li><img src="images/4.png" alt=""></li>
<li><img src="images/5.png" alt=""></li>
</ul>
<ul class="num">
<li>1</li>
<li>2</li>
<li>3</li>
<li>4</li>
<li>5</li>
</ul>
<div class="left arrow"></div>
<div class="right arrow"></div>
</div>
<script>
var boxs = document.getElementsByClassName('box');
var imgs_li = document.querySelectorAll(".image li");
var nums_li = document.querySelectorAll(".num li");
var left = document.getElementsByClassName('left');
var right = document.getElementsByClassName('right');
var i=0;
imgs_li[0].style.display='block';
nums_li[0].style.background='red';
function cgpic(m){
for(let i=0;i<imgs_li.length;i++){
imgs_li[i].style.display='none';
}
imgs_li[m].style.display='block';
imgs_li[m].animate([
{ opacity:0.4},
{ opacity:1}
],{
duration: 600,
});
}
function cgnum(m){
for(let i=0;i<nums_li.length;i++){
nums_li[i].style.background='#fff';
}
nums_li[m].style.background='red';
}
startmove = function(){
timer = setInterval(() => {
if(i<nums_li.length){
cgpic(i)
cgnum(i)
i+=1
}else{
i=0
cgpic(i)
cgnum(i)
i=1
}
}, 2000);
}
startmove();
boxs[0].onmouseover = function(){
clearInterval(timer);
}
boxs[0].onmouseout = function(){
startmove();
}
for(let j=0;j<nums_li.length;j++){
nums_li[j].onclick=function(){
cgnum(j);
cgpic(j);
i=j;
};
}
left[0].onclick=function(){
if(i>0){
i-=1;
cgnum(i);
cgpic(i);
}else{
i=nums_li.length-1;
cgnum(i);
cgpic(i);
}
};
right[0].onclick=function(){
if(i<nums_li.length-1){
i+=1;
cgnum(i);
cgpic(i);
}else{
i=0;
cgnum(i);
cgpic(i);
}
};
right[0].animate
</script>
</body>
</html>
