基于html、js实现网页中常见的轮播图

html:

<div id="box">
        <img src="./images/1.jpg" alt="">
        <img src="./images/2.jpg" alt="">
        <img src="./images/3.jpg" alt="">
        <img src="./images/4.jpg" alt="">
        <img src="./images/5.jpg" alt="">
        <img src="images/6.jpg" alt="" />
        <img src="images/7.jpg" alt=""  />
        <img src="images/8.jpg" alt="" />
        <div class="con" id="left"><</div>
        <div class="con" id="right">></div>
            <ul id="list">
                <li></li>
                <li></li>
                <li></li>
                <li></li>
                <li></li>
                <li></li>
                <li></li>
                <li></li>
            </ul>
        </div>

css:

<style>
    #box{
        width: 700px;
        height: 400px;
        margin: 0 auto;
        position: relative;
    }
    #box img{
        position: absolute;
        width: 100%;
        height: 100%;
    }
    .con{
        width: 50px;
        height: 100px;
        background:palegreen;
        position: absolute;
        top: calc(50% - 50px);
        line-height: 100px;
        font-size: 60px;
        text-align: center;
    }
    .con:nth-of-type(2){
        right:0
    }
    ul,li{
        margin: 0;
        padding: 0;
        list-style: none;
    }
    #list{
        position: absolute;
        display:flex;
        bottom: 10px;
        left: calc(45% - 100px);
    }
    #list li{
        width: 20px;
        height: 20px;
        background:#fff;
        margin: 0 10px;
        border-radius: 50%;
    }
    .active{
        background:red !important;
    }
</style>

js:

<script>
		var box = document.getElementById("box")
		var img = document.getElementsByTagName("img")
		var list = document.getElementById("list")
		var con = list.getElementsByTagName("li")
		var left = document.getElementById("left")
		var right = document.getElementById("right")
		var index = 0;
		var Inter;
		function goto(){
			index = index % img.length;
			for(var i = 0;i<img.length;i++){
				img[i].style.display = "none"
				con[i].index = i
				con[i].className=""
			}
			img[index].style.display="block"
			con[index].className="active"
		}//程序主函数
		settime()
		function settime(){
			Inter = setInterval(()=>{
				goto()
				index++;
			},1000)
		}//自动轮播
		left.addEventListener("click",()=>{
			index--
			if(index<0){
				index = img.length - 1
			}
			goto()
		})
		right.addEventListener("click",()=>{
			index++
			if(index>img.length-1){
				index=0
			}
			goto()
		})//左右按钮切换实现
		list.addEventListener("click",(e)=>{
			index = e.target.index
			console.log(index);
			goto()
		})//点击图标切换实现
		box.addEventListener("mouseover",()=>{
			clearInterval(Inter)
		})
		box.addEventListener("mouseout",()=>{
			settime()
		})//鼠标移入移出实现
	</script>

实现效果