基于HTML、CSS与JavaScript实现图片轮播效果

<html lang="en">
<head>
 <meta charset="UTF-8">
 <meta name="viewport" content="width=device-width, initial-scale=1.0">
 <meta http-equiv="X-UA-Compatible" content="ie=edge">
 <link rel="stylesheet" href="carousel.css" rel="external nofollow" >
 <title>轮播图效果</title>
</head>
<body>
 <section id="main">
 <div id="picture"></div>
 <!-- 添加图中按钮 图片轮播在js中大致成型后再写最好-->
 <div id="dot">
 <span></span>
 <span></span>
 <span></span>
 <span></span>
 <span></span>
 </div>

 <!-- 添加切换按钮 -->
 <div id="an">
  <div class="left">&lt;</div>
  <div class="right">&gt;</div>
 </div>
 </section>
 <script src="jquery.js"></script>
 <script src="carousel.js"></script>
</body>

#main{
 width: 655px;
 height: 361px;
 position: relative;
}
#picture{
 width:100%;
 height: 100%;
}
#picture img{
 
 width:100%;
 height: 100%;
 display: none;
}

#picture img:nth-child(1){
 display: inline-block;
}


/* 设置圆点的样式 */
#dot span{
 display: inline-block;
 width:25px;
 height: 25px;
 border-radius: 50%;
 background-color: gray;
 margin-left: 10px;
 opacity: 0.6
}


#dot{
 position: absolute;
 right: 40px;
 bottom: 30px;
}


/* 设置页面刚加载的圆点初始状态 1 第一个圆点放大1.2倍 2、颜色变成蓝色
 */
 #dot :nth-of-type(1){
 transform: scale(1.2);
 background-color: blue;
 }


 .left ,.right{
 
 width: 40px;
 height: 40px;
 border-radius: 50%;
 font-size: 30px;
 color: white;
 position: absolute;
 bottom: calc((100% - 40px)/2);
 text-align: center;
 }


 .left{
 left: 15px;
 }
 .right{
 right: 15px;
 }


 .left:hover ,.right:hover{
 background-color: white;
 color:red;
 }

for(var i=1; i<6;i++){
 $('#picture').append("<img src='./../images/"+i+".jpg' >");
}
//给图片转化设置定时函数
var index=0;
var timer;
function changeImageDot(){
 $('#picture img:nth-child('+(index+1)+')').css({
 display:'block',
 }).siblings().css({
 display:'none',
 });
 //设置随图片切换，对应的圆点样式发生变化
 // index+1 是因为索引是从0开始而 nth-child(i) 中的i是从1 开始的
 $('#dot span:nth-child('+(index+1)+')').css({
 transform: 'scale(1.2)',
 'background-color': 'blue',
 }).siblings().css({
 transform: 'scale(1)',
 'background-color':'gray',
 });
}
function produceTime(){
 timer=setInterval(function(){
 index++;
 if(index==5) 
 index=0;
 changeImageDot();
 
 },2000);
}

produceTime();
//鼠标悬浮在圆点上 ， 圆点和图片的变化
$('#dot span').mouseenter(function(){
 index=$(this).index();
 changeImageDot(); 
 clearInterval(timer); 
 produceTime(); 
});
//缺点：点击切换按钮后，图片切换后 ，会立即切换到下一个图片，需要设置 清除计时器后再新建一个计时器
$('.left').click(function(){
 index--;
 if(index==-1)
 index=4;
 changeImageDot(); 
 clearInterval(timer);
 produceTime();


});


$('.right').click(function(){
 index++;
 if(index==5)
 index=0;
 changeImageDot();
 clearInterval(timer);
 produceTime();