仿网易云官网轮播图 html+css+js

先看效果:

在这里插入图片描述
可自动轮播,左右箭头按钮和下方小圆点可切图,鼠标移入时停止自动轮播。
视频演示地址:https://player.bilibili.com/player.html?aid=289441114

实现(后面有完整源码):

1. 定义标签,看注释:

<!-- 底层盒子 -->
 <main id="main">
        <!-- 虚化的背景 -->
        <div class="bg"></div>
        <!-- 放图片底层盒子 -->
        <section>
            <!-- 放图片的盒子 -->
            <div class="tupian">
                <img src="img/images/1.jpg" class="image">
            </div>
            <!-- 放小圆点的盒子,里面的小圆点数量通过js动态添加 -->
            <div class="select">
                <!--  <div class="dian"></div>
                 <div class="dian check"></div>      -->          
            </div>
            <!-- 左右切换按钮 -->
            <div class="bt left"><span class="anniu"></span></div>
            <div class="bt right"><span class="anniu"></span></div>
        </section>
    </main>

2. 设置底层盒子和虚化背景的css样式:

   main{
        position: relative;
        top: 20vh;
        height: 300px;
        width: 100%;          
        overflow: hidden;
    }
    main .bg{
        position: absolute;
        top: -50%;
        left: -50%;
        width: 200%;
        height: 200%;
        background-image: url(img/images/1.jpg);
        background-size: 100% 100%;
        filter: blur(30px);
    }

position: relative; 相对定位
overflow: hidden; 溢出隐藏
position: absolute; 绝对定位
background-image: url(img/images/1.jpg); 背景图先设置轮播图的第一张
filter: blur(30px); 模糊效果,让背景虚化

3. 设置放图片的底层盒子的css:

 main section{
            position: relative;
            left: 50%;
            transform: translateX(-50%);
            height: 100%;
            width: 100%;
            max-width: 980px;       
        }

left: 50%;
transform: translateX(-50%); 居中。
max-width: 980px; 最大宽度只有980px;
4. 设置放图片的盒子与图片的css:

 main section .tupian{
            width: 100%;
            height: 100%;
        }
        main section .tupian .image{
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

object-fit: cover;保持图片原有尺寸比例。但部分内容可能被剪切。

5. 设置放小圆点的盒子与小圆点的css:

main .select{
            position: absolute;
            bottom: 10px;
            height: 30px;
            width: 100%;
            display: flex;
            justify-content: center;
            align-items: center;
        }
        main .select .dian{
            margin: 3px;
            width: 10px;
            height: 10px;
            border-radius: 50%;
            border: 2px solid rgb(255, 254, 254); 
           
        }
        main .select .dian:hover{
            background-color: rgb(255, 254, 254);
            cursor: pointer;
        }

display: flex;
justify-content: center;
align-items: center; flex布局,让子元素居中对齐。
margin: 3px; 外边距,让圆点间有间隔。
background-color: rgb(255, 254, 254); 白色;
cursor: pointer; 鼠标样式为小手。

6. 设置左右按钮的css:

main section .bt{
            position: absolute;
            top: 50%;
            transform: translateY(-50%);
            width: 50px;
            height: 50px;
            background-color: rgba(82, 81, 81, 0.2);
            border-radius: 20%;
            cursor: pointer;
            transition: all 0.3s;
        }
        main section .bt:hover{
            box-shadow: inset 0 0 1px rgba(255, 255, 255,.8),
            inset 0 0 5px rgba(255, 255, 255,.8),
            inset 0 0 15px rgba(255, 255, 255,.8);
        }
        main section .left{
            left: -60px;
        }
        main section .right{
            right: -60px;
        }

top: 50%;
transform: translateY(-50%); 垂直居中
transition: all 0.3s; 过渡效果
box-shadow: inset 0 0 1px rgba(255, 255, 255,.8) 阴影

7. 当设置屏幕过小时,左右按钮的位置要变化:

  /*当屏幕尺寸小于1100px时,应用下面的CSS样式*/
        @media screen and (max-width: 1100px)
        {
            main section .left{
            left: 20px;
        }
        main section .right{
            right: 20px;
        }
        }

以上写法为CSS3自适应布局与Media Queries,详细用法点击链接。

8. 设置左右按钮里的字体图标的css样式:

main section .anniu{
           position: absolute;
           top: 50%;
           left: 50%;
           transform: translate(-50%,-50%);
           font-size: 25px;
           color: rgb(255, 255, 255);
           user-select: none;
           transition: all 0.3s;
           
        }

top: 50%;
left: 50%;
transform: translate(-50%,-50%);居中
user-select: none; 文本不可选中
transition: all 0.3s; 过渡。

9. 设置类.yun与.check,.yun的作用是设置动画,让图片在自动轮播切图时有一种变透明然后再切的效果。.check的作用是让当前图片对应的圆点为背景为白色。

.yun{
            animation: bian 5s linear infinite;
        }
      

        @keyframes bian{
             0%,100%{
                opacity: 0.2;
                backdrop-filter: blur(10px); 
             }

            30%,80%{
                opacity: 1;
                backdrop-filter: blur(0px); 
            }
          
        }

.check{
     
            background-color: rgb(255, 254, 254);
        }

10.js部分,用的都是基础的js,没有用什么算法和特殊的函数。看注释。

<script>

        /* 获取元素 */

        var main = document.getElementById('main');
        var bg = document.querySelector('.bg');
        var image = document.querySelector('.image');
        var select = document.querySelector('.select');
        var dian = document.getElementsByClassName('dian');
        var left = document.querySelector('.left');
        var right = document.querySelector('.right');

        /* 设置数组,里面放图片的地址 */

        var picture = ['img/images/1.jpg', 'img/images/2.jpg', 'img/images/3.jpg', 'img/images/4.jpg', 'img/images/5.jpg', 'img/images/6.jpg'];

        /* 设置index为0,这个变量后面就一直用来充当图片数组的下标 */
        var index = 0;

        /* 从图片数组的长度,动态添加小圆点 */

        for (let i = 0; i < picture.length; i++) {
         /* 创建元素和添加元素 */
            let dot = document.createElement('div');
            dot.classList.add('dian');
            select.appendChild(dot);
            /* 添加自定义属性index,对应每张图片的下标 */
            dot.bianhao = i;
        }

        /* 排他思想,清除所有小圆点check样式,后面要引用这个封装函数 */

        function qingchu() {
            for (let i = 0; i < dian.length; i++) {
                dian[i].classList.remove('check');

            }
        }


        /* 切下一张图的封装函数,后面也是要引用 */

        function yunxing() {
               /* index加1 */
            index = index + 1;
            if (index == picture.length) {
                index = 0;
            }
             /* 显示图片,显示图片数组下标为目前index那张 */
            image.src = picture[index];
             /* 虚化背景也要换 */
            bg.style.cssText = ` background-image: url(${picture[index]});`

            /* 小圆点的显示 */
            qingchu();
              /* 显示那张图就显示对于的圆点,给他.check的样式 */
            dian[index].classList.add('check');

            /* 若index超过,回到-1 */
            if (index == picture.length - 1) {
                index = -1;
            }

        }



        /* 点击向右按钮时的操作 */

        right.addEventListener('click', function () {
            /* 直接用上面的切图封装函数 */
            yunxing();
        })

        /* 点击向左按钮时的操作,跟上面的切下张图封装函数异曲同工 */

        left.addEventListener('click', function () {

            index = index - 1;
            if (index == -1) {
                index = picture.length - 1;
            }
            image.src = picture[index];
            bg.style.cssText = ` background-image: url(${picture[index]});`

            /* 向左时小圆点的显示 */
            qingchu();
            dian[index].classList.add('check');

        })


        /* 进入main这个底层盒子时,停止自动轮播和.yun类的动画效果,自动轮播的定时器我写在最后面 */

        main.addEventListener('mouseover', function () {

            clearInterval(lunbo);

            image.classList.remove('yun');

        })

        /*  离开main这个底层盒子时,开始自动轮播和.yun类的动画效果,自动轮播的定时器我写在最后面 */

        main.addEventListener('mouseout', function () {

            lunbo = setInterval(yunxing, 5000);

            image.classList.add('yun');
            image.style.animationDelay = '5s';
        })


        /*  点击小圆点时的切图操作 */
        for (let i = 0; i < picture.length; i++) {
            dian[i].addEventListener('click', function () {
                qingchu();
                this.classList.add('check');
                index = i;
                image.src = picture[index];
            bg.style.cssText = ` background-image: url(${picture[index]});`

            })
        }

        /* 自动轮播定时器与初始状态 */

        lunbo = setInterval(yunxing, 5000);
        image.classList.add('yun');
        dian[0].classList.add('check');

    </script>

完整代码

<!DOCTYPE html>
<html lang="zh-CN">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        @font-face {
            font-family: 'icomoon';
            src: url('fonts/icomoon.eot?wr5es');
            src: url('fonts/icomoon.eot?wr5es#iefix') format('embedded-opentype'),
                url('fonts/icomoon.ttf?wr5es') format('truetype'),
                url('fonts/icomoon.woff?wr5es') format('woff'),
                url('fonts/icomoon.svg?wr5es#icomoon') format('svg');
            font-weight: normal;
            font-style: normal;
            font-display: block;
        }

        * {
            font-family: 'icomoon';
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        body {
            height: 100vh;
            display: flex;
            justify-content: center;
            align-items: flex-start;
            background-color: rgba(50, 128, 102, 0.9);
        }

        main {
            position: relative;
            top: 20vh;
            height: 300px;
            width: 100%;
            overflow: hidden;
        }

        main .bg {
            position: absolute;
            top: -50%;
            left: -50%;
            width: 200%;
            height: 200%;
            background-image: url(img/images/1.jpg);
            background-size: 100% 100%;
            filter: blur(30px);
        }

        main section {
            position: relative;
            left: 50%;
            transform: translateX(-50%);
            height: 100%;
            width: 100%;
            max-width: 980px;

        }

        main section .tupian {
            width: 100%;
            height: 100%;
        }

        main section .tupian .image {
            width: 100%;
            height: 100%;
            object-fit: cover;


        }

        .yun {
            animation: bian 5s linear infinite;
        }


        @keyframes bian {

            0%,
            100% {
                opacity: 0.2;
                backdrop-filter: blur(10px);
            }

            30%,
            80% {
                opacity: 1;
                backdrop-filter: blur(0px);
            }

        }

        main .select {
            position: absolute;
            bottom: 10px;
            height: 30px;
            width: 100%;
            display: flex;
            justify-content: center;
            align-items: center;
        }

        main .select .dian {
            margin: 3px;
            width: 10px;
            height: 10px;
            border-radius: 50%;
            border: 2px solid rgb(255, 254, 254);

        }

        main .select .dian:hover {
            background-color: rgb(255, 254, 254);
            cursor: pointer;
        }

        .check {

            background-color: rgb(255, 254, 254);
        }

        main section .bt {
            position: absolute;
            top: 50%;
            transform: translateY(-50%);
            width: 50px;
            height: 50px;
            background-color: rgba(82, 81, 81, 0.2);
            border-radius: 20%;
            cursor: pointer;
            transition: all 0.3s;
        }

        main section .bt:hover {
            box-shadow: inset 0 0 1px rgba(255, 255, 255, .8),
                inset 0 0 5px rgba(255, 255, 255, .8),
                inset 0 0 15px rgba(255, 255, 255, .8);
        }

        main section .left {
            left: -60px;
        }

        main section .right {
            right: -60px;
        }

        /*当屏幕尺寸小于1100px时,应用下面的CSS样式,详细用法网址:https://www.xuewangzhan.net/baike/css3-379.html*/
        @media screen and (max-width: 1100px) {
            main section .left {
                left: 20px;
            }

            main section .right {
                right: 20px;
            }
        }

        main section .anniu {
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            font-size: 25px;
            color: rgb(255, 255, 255);
            user-select: none;
            transition: all 0.3s;

        }

        .txt {

            position: fixed;
            bottom: 5vh;
            left: 50%;
            transform: translateX(-50%);
            width: 100%;
            height: 100px;
            font-family: 'fangsong';
            font-size: 50px;
            text-align: center;
            color: rgba(255, 255, 255, .9);
            user-select: none;
        }
    </style>
</head>

<body>
    <main id="main">
        <!-- 虚化背景 -->
        <div class="bg"></div>
        <!-- 图片框 -->
        <section>
            <!-- 放图片 -->
            <div class="tupian">
                <img src="img/images/1.jpg" class="image">
            </div>
            <!-- 小圆点 -->
            <div class="select">
                <!--  <div class="dian"></div>
                 <div class="dian check"></div>      -->
            </div>
            <!-- 左右切换按钮 -->
            <div class="bt left"><span class="anniu"></span></div>
            <div class="bt right"><span class="anniu"></span></div>
        </section>
    </main>

    <div class="txt">北极光之夜</div>

    <script>

        /* 获取元素 */

        var main = document.getElementById('main');
        var bg = document.querySelector('.bg');
        var image = document.querySelector('.image');
        var select = document.querySelector('.select');
        var dian = document.getElementsByClassName('dian');
        var left = document.querySelector('.left');
        var right = document.querySelector('.right');

        /* 设置数组,里面放图片的地址 */

        var picture = ['img/images/1.jpg', 'img/images/2.jpg', 'img/images/3.jpg', 'img/images/4.jpg', 'img/images/5.jpg', 'img/images/6.jpg'];

        /* 设置index为0,这个变量后面就一直用来充当图片数组的下标 */
        var index = 0;

        /* 从图片数组的长度,动态添加小圆点 */

        for (let i = 0; i < picture.length; i++) {
            let dot = document.createElement('div');
            dot.classList.add('dian');
            select.appendChild(dot);
            /* 添加自定义属性index,对应每张图片的下标 */
            dot.bianhao = i;
        }

        /* 排他思想,清除所有小圆点check样式,后面要引用这个封装函数 */

        function qingchu() {
            for (let i = 0; i < dian.length; i++) {
                dian[i].classList.remove('check');

            }
        }


        /* 切下一张图的封装函数,后面也是要引用 */

        function yunxing() {
               /* index加1 */
            index = index + 1;
            if (index == picture.length) {
                index = 0;
            }
             /* 显示图片,显示图片数组下标为目前index那张 */
            image.src = picture[index];
             /* 虚化背景也要换 */
            bg.style.cssText = ` background-image: url(${picture[index]});`

            /* 小圆点的显示 */
            qingchu();
              /* 显示那张图就显示对于的圆点,给他.check的样式 */
            dian[index].classList.add('check');

            /* 若index超过,回到-1 */
            if (index == picture.length - 1) {
                index = -1;
            }

        }



        /* 点击向右按钮时的操作 */

        right.addEventListener('click', function () {
            /* 直接用上面的切图封装函数 */
            yunxing();
        })

        /* 点击向左按钮时的操作,跟上面的切下张图封装函数异曲同工 */

        left.addEventListener('click', function () {

            index = index - 1;
            if (index == -1) {
                index = picture.length - 1;
            }
            image.src = picture[index];
            bg.style.cssText = ` background-image: url(${picture[index]});`

            /* 向左时小圆点的显示 */
            qingchu();
            dian[index].classList.add('check');

        })


        /* 进入main这个底层盒子时,停止自动轮播和.yun类的动画效果,自动轮播的定时器我写在最后面 */

        main.addEventListener('mouseover', function () {

            clearInterval(lunbo);

            image.classList.remove('yun');

        })

        /*  离开main这个底层盒子时,开始自动轮播和.yun类的动画效果,自动轮播的定时器我写在最后面 */

        main.addEventListener('mouseout', function () {

            lunbo = setInterval(yunxing, 5000);

            image.classList.add('yun');
            image.style.animationDelay = '5s';
        })


        /*  点击小圆点时的切图操作 */
        for (let i = 0; i < picture.length; i++) {
            dian[i].addEventListener('click', function () {
                qingchu();
                this.classList.add('check');
                index = i;
                image.src = picture[index];
            bg.style.cssText = ` background-image: url(${picture[index]});`

            })
        }

        /* 自动轮播定时器与初始状态 */

        lunbo = setInterval(yunxing, 5000);
        image.classList.add('yun');
        dian[0].classList.add('check');

    </script>
</body>

</html>

总结:

下次见~

(完)