23个css动画效果，持续更新中...

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    头图
    代码github仓库：https://github.com/shuirongsh...

    使用方式

    1. 看名称效果图，有没有和自己想要的效果类似的
    2. 有的话，复制粘贴代码使用
    3. 也可以自己修改一下
    4. css效果并不是特别难，只是有时候我们可能想不到
    5. 笔者空闲时间，会继续更新的哦，点赞关注不迷路^_^

    注意：一些代码思路，笔者写在代码注释中去了

    1_鼠标悬浮文字阴影跳动

    效果图

    代码

    <!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>Document</title>
    <style>
        h1 {
            width: 80px;
            color: cornflowerblue;
        }

        h1:hover {
            animation: animate 0.5s linear infinite;
        }

        @keyframes animate {

            0%,
            25% {
                text-shadow: 2px 2px 2px #ff6384;
            }

            50% {
                text-shadow: 2px -2px 2px #ff6384;
            }

            75% {
                text-shadow: -2px 2px 2px #ff6384;
            }

            100% {
                text-shadow: -2px -2px 2px #ff6384;
            }
        }
    </style>
</head>

<body>
    <h1>hello</h1>
    <!-- 
        一说到阴影，我们常常就会想到盒子的阴影，box-shadow。实际上css3另外提供了文字阴影text-shadow
        text-shadow对应属性 text-shadow: h-shadow v-shadow blur color;
                                         水平阴影 垂直阴影 模糊范围 颜色值
        本例中，当鼠标悬浮的时候，给文字加上动画。四个方向依次都出现文字阴影，就类似跳动的效果了
    -->
</body>

</html>

    2_鼠标悬浮文字底部出现下划线并变宽

    效果图

    代码

    <!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>Document</title>
    <style>
        .box {
            width: 160px;
            /* 外盒子相对定位，便于伪元素绝对定位(使下划线在文字的最底下) */
            position: relative;
        }

        h1::before {
            content: '';
            height: 4px;
            background: red;
            /* 伪元素默认样式 display: inline;所以需要转成inline-block宽高才会生效 */
            display: inline-block;
            /* 通过定位使下划线在最低层 */
            position: absolute;
            bottom: -6px;
            width: 0;
            /* 加上一个过渡效果，使之丝滑一些 */
            transition: width 0.36s;
        }

        h1:hover::before {
            /* 悬浮时候，让下划线伪元素宽度变成100%即可出现效果 */
            width: 100%;
        }
    </style>
</head>

<body>
    <div class="box">
        <h1>悬浮下划线</h1>
    </div>
    <!-- 
        思路：
            1. 使用伪元素创建下划线
            2. 通过定位让下划线的位置在文字的底部
            3. 初始下划线宽度为0
            4. 悬浮时更改为100%即出现效果
     -->
</body>

</html>

    3_文字颜色渐变流光效果

    效果图

    代码

    <!DOCTYPE html>
<html>

<head>
    <meta charset="UTF-8">
    <title></title>
    <style>
        /* 加上 -webkit- 注意兼容 */
        h1 {
            background: -webkit-linear-gradient(135deg,
                    #0eaf6d,
                    #ff6ac6 25%,
                    #147b96 50%,
                    #e6d205 55%,
                    #2cc4e0 60%,
                    #8b2ce0 80%,
                    #ff6384 95%,
                    #08dfb4);
            /* 文字颜色填充设置为透明 */
            -webkit-text-fill-color: transparent;
            /* 背景裁剪，即让文字使用背景色 */
            -webkit-background-clip: text;
            /* 背景图放大一下，看着柔和一些 */
            -webkit-background-size: 200% 100%;
            /* 应用动画flowCss 12秒速度 无限循环 线性匀速动画*/
            -webkit-animation: flowCss 12s infinite linear;
        }

        @-webkit-keyframes flowCss {
            0% {
                /* 移动背景位置 */
                background-position: 0 0;
            }

            100% {
                background-position: -400% 0;
            }
        }

        h1:hover {
            -webkit-animation: flowCss 4s infinite linear;
        }
    </style>
</head>

<body>
    <h1>文字颜色渐变流光效果</h1>
    <!-- 思路就是 文字颜色填充为透明、背景裁剪让文字使用背景色、然后设置一个渐变背景色
    再放大一下背景，最后通过动画移动背景位置，于是效果就出来了 -->
</body>

</html>

    4_打字机效果

    效果图

    代码

    <!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>Document</title>
    <style>
        h1 {
            /* 本例12个文字(加标点符号)；有多少个文字，width就是多少个em */
            width: 12em;
            /* 加上两个动画，一个是打字动画，使用steps让字一个一个的出现，
             注意step和字数保持一致，光标动画也是同理，*/
            animation: typingWords 5s steps(12) infinite, cursor 0.5s steps(1) infinite;
            /* 要设置不允许换行，且溢出隐藏 */
            white-space: nowrap;
            overflow: hidden;
            /* 使用右边框作为打印的指针光标 */
            border-right: 1px solid #000;
        }

        @keyframes typingWords {
            0% {
                width: 0;
            }
        }

        @keyframes cursor {
            50% {
                border-color: transparent;
            }
        }
    </style>
</head>

<body>
    <h1>欢迎光临呐，各位访客们。</h1>
    <!-- css大佬张鑫旭的实现方式：https://www.zhangxinxu.com/wordpress/2019/01/css-typewriter-effect/ -->
</body>

</html>

    5_文字左右旋转晃动效果

    效果图

    代码

    <!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>Document</title>
    <style>
        span {
            font-size: 48px;
            font-weight: 600;
            animation: rotate 0.3s ease infinite;
            /* 注意，要开启绝对定位哦 */
            position: absolute;
        }

        /* 鼠标悬浮开启动画也可以的
        span:hover {
            animation: rotate 0.3s ease infinite;
        } */

        @keyframes rotate {
            0% {
                transform: rotate(0);
            }

            20% {
                transform: rotate(-2deg);
            }

            60% {
                transform: rotate(0);
            }

            80% {
                transform: rotate(2deg);
            }

            100% {
                transform: rotate(0);
            }
        }

        span:nth-child(2) {
            margin-left: 108px;
        }

        span:nth-child(3) {
            margin-left: 216px;
        }
    </style>
</head>

<body>
    <span>代码</span>
    <span>修仙</span>
    <span>之路</span>
</body>

</html>

    6_圆圈呼吸扩散效果

    效果图

    代码

    <!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>Document</title>
    <style>
        body {
            margin: 120px;
        }

        .circle-breath {
            background: pink;
            box-shadow: 0 0 0 0 rgb(204, 73, 152);
            height: 36px;
            width: 36px;
            border-radius: 50%;
            animation: donghua 2.4s infinite;
        }

        @keyframes donghua {
            0% {
                transform: scale(0.60);
                /* 注意rgba中的a的设置 */
                box-shadow: 0 0 0 0 rgba(204, 73, 152, 60%);
            }

            60% {
                transform: scale(1);
                box-shadow: 0 0 0 36px rgba(204, 73, 152, 0%);
            }

            100% {
                transform: scale(0.60);
                box-shadow: 0 0 0 0 rgba(204, 73, 152, 0%);
            }
        }
    </style>
</head>

<body>
    <div class="circle-breath"></div>
    <!-- 
        动画中应用背景色阴影，背景色阴影初始透明度为60%，后续为0
        搭配使用scale进行缩放，便可以达到圆圈呼吸扩散效果
     -->
</body>

</html>

    7_音频波纹加载效果

    效果图

    代码

    <!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>Document</title>
    <style>
        body {
            padding: 120px;
        }

        .music {
            width: 175px;
            height: 100px;
            display: flex;
        }

        .music span {
            width: 6px;
            border-radius: 18px;
            margin-right: 6px;
        }

        .music span:nth-child(1) {
            /* 时间递增，参差不齐的效果 */
            animation: bar1 2s 0.2s infinite linear;
        }

        .music span:nth-child(2) {
            animation: bar2 2s 0.4s infinite linear;
        }

        .music span:nth-child(3) {
            animation: bar3 2s 0.6s infinite linear;
        }

        .music span:nth-child(4) {
            animation: bar4 2s 0.8s infinite linear;
        }

        .music span:nth-child(5) {
            animation: bar5 2s 1.0s infinite linear;
        }

        .music span:nth-child(6) {
            animation: bar6 2s 1.2s infinite linear;
        }

        .music span:nth-child(7) {
            animation: bar7 2s 1.4s infinite linear;
        }

        .music span:nth-child(8) {
            animation: bar8 2s 1.6s infinite linear;
        }

        .music span:nth-child(9) {
            animation: bar9 2s 1.8s infinite linear;
        }

        @keyframes bar1 {
            0% {
                background: #f677b0;
                margin-top: 25%;
                height: 10%;
            }

            50% {
                background: #f677b0;
                height: 100%;
                margin-top: 0%;
            }

            100% {
                background: #f677b0;
                height: 10%;
                margin-top: 25%;
            }
        }

        @keyframes bar2 {
            0% {
                background: #df7ff2;
                margin-top: 25%;
                height: 10%;
            }

            50% {
                background: #df7ff2;
                height: 100%;
                margin-top: 0%;
            }

            100% {
                background: #df7ff2;
                height: 10%;
                margin-top: 25%;
            }
        }

        @keyframes bar3 {
            0% {
                background: #8c7ff2;
                margin-top: 25%;
                height: 10%;
            }

            50% {
                background: #8c7ff2;
                height: 100%;
                margin-top: 0%;
            }

            100% {
                background: #8c7ff2;
                height: 10%;
                margin-top: 25%;
            }
        }

        @keyframes bar4 {
            0% {
                background: #7fd0f2;
                margin-top: 25%;
                height: 10%;
            }

            50% {
                background: #7fd0f2;
                height: 100%;
                margin-top: 0%;
            }

            100% {
                background: #7fd0f2;
                height: 10%;
                margin-top: 25%;
            }
        }

        @keyframes bar5 {
            0% {
                background: #7ff2d3;
                margin-top: 25%;
                height: 10%;
            }

            50% {
                background: #7ff2d3;
                height: 100%;
                margin-top: 0%;
            }

            100% {
                background: #7ff2d3;
                height: 10%;
                margin-top: 25%;
            }
        }

        @keyframes bar6 {
            0% {
                background: #7ff2a0;
                margin-top: 25%;
                height: 10%;
            }

            50% {
                background: #7ff2a0;
                height: 100%;
                margin-top: 0%;
            }

            100% {
                background: #7ff2a0;
                height: 10%;
                margin-top: 25%;
            }
        }

        @keyframes bar7 {
            0% {
                background: #adf27f;
                margin-top: 25%;
                height: 10%;
            }

            50% {
                background: #adf27f;
                height: 100%;
                margin-top: 0%;
            }

            100% {
                background: #adf27f;
                height: 10%;
                margin-top: 25%;
            }
        }

        @keyframes bar8 {
            0% {
                background: #e7f27f;
                margin-top: 25%;
                height: 10%;
            }

            50% {
                background: #e7f27f;
                height: 100%;
                margin-top: 0%;
            }

            100% {
                background: #e7f27f;
                height: 10%;
                margin-top: 25%;
            }
        }

        @keyframes bar9 {
            0% {
                background: #ecaa64;
                margin-top: 25%;
                height: 10%;
            }

            50% {
                background: #ecaa64;
                height: 100%;
                margin-top: 0%;
            }

            100% {
                background: #ecaa64;
                height: 10%;
                margin-top: 25%;
            }
        }
    </style>
</head>

<body>
    <div class="music">
        <span></span>
        <span></span>
        <span></span>
        <span></span>
        <span></span>
        <span></span>
        <span></span>
        <span></span>
        <span></span>
    </div>
    <!-- 给每一个bar指定margin-top和height的动画的变化
    为了效果更好看，让每一个bar的背景色都不一样，便是五彩斑斓了 -->
</body>

</html>

    8_四周线条环绕流动效果

    效果图

    代码

    <!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>Document</title>
    <style>
        body {
            padding: 120px;
        }

        .mainbox {
            width: 320px;
            height: 320px;
            position: relative;
            /* 超出隐藏需要加上 */
            overflow: hidden;
        }

        .content {
            width: 320px;
            height: 320px;
            line-height: 320px;
            text-align: center;
            background-color: #cde;
        }

        .line {
            /* 结合外层元素的相对定位 */
            position: absolute;
        }

        .line:nth-child(1) {
            top: 0;
            left: 0;
            width: 100%;
            height: 3px;
            /* 加上渐变效果，方可形成拖尾效果 */
            background: linear-gradient(90deg, transparent, orange);
            animation: animate1 8s linear infinite;
        }

        /* 分别控制其上下左右的定位距离，从而形成线条跟随效果 */
        @keyframes animate1 {
            0% {
                left: -100%;
            }

            50%,
            100% {
                left: 100%;
            }
        }

        .line:nth-child(2) {
            top: -100%;
            right: 0;
            width: 3px;
            height: 100%;
            background: linear-gradient(180deg, transparent, red);
            animation: animate2 8s linear infinite;
            /* 注意要加上延时触发动画效果，这样线条才会依次触发 */
            animation-delay: 2s;
        }

        @keyframes animate2 {
            0% {
                top: -100%;
            }

            50%,
            100% {
                top: 100%;
            }
        }

        .line:nth-child(3) {
            bottom: 0;
            right: 0;
            width: 100%;
            background: linear-gradient(270deg, transparent, green);
            animation: animate3 8s linear infinite;
            animation-delay: 4s;
        }

        @keyframes animate3 {
            0% {
                right: -100%;
                height: 3px;
            }

            50%,
            100% {
                height: 2px;
                right: 100%;
            }
        }

        .line:nth-child(4) {
            bottom: -100%;
            left: 0;
            width: 3px;
            height: 100%;
            background: linear-gradient(360deg, transparent, #3a86ff);
            animation: animate4 8s linear infinite;
            animation-delay: 6s;
        }

        @keyframes animate4 {
            0% {
                bottom: -100%;
            }

            50%,
            100% {
                bottom: 100%;
            }
        }
    </style>
</head>

<body>
    <div class="mainbox">
        <span class="line"></span>
        <span class="line"></span>
        <span class="line"></span>
        <span class="line"></span>
        <div class="content">线条环绕</div>
    </div>
</body>

</html>

    9_鼠标悬浮开门关门效果

    效果图

    代码

    <!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>Document</title>
    <style>
        body {
            box-sizing: border-box;
            padding: 160px 0 0 240px;
        }

        /* 门容器样式 */
        .doorWrap {
            width: 320px;
            height: 320px;
            border: 1px solid #666;
            perspective: 500px;
            position: relative;
            display: flex;
        }

        /* 左门右门的共有样式 */
        .leftDoor,
        .rightDoor {
            width: 50%;
            height: 100%;
            background-color: rgb(194, 37, 37);
            transition: 1.2s;
            z-index: 2;
            display: flex;
            justify-content: center;
            align-items: center;
            border: 1px solid #333;
        }

        /* 设置旋转元素的基点，左边大门以左侧为基准点旋转 */
        .leftDoor {
            transform-origin: left;
        }

        /* 设置旋转元素的基点，右边大门以右侧为基准点旋转 */
        .rightDoor {
            transform-origin: right;
        }

        /* 当鼠标悬浮的时候，设置开门的幅度，左门往左侧开 */
        .doorWrap:hover .leftDoor {
            transform: rotateY(-130deg);
        }

        /* 右门往右侧开 */
        .doorWrap:hover .rightDoor {
            transform: rotateY(130deg);
        }

        /* 内容区的定位层级稍微低一些 */
        .content {
            position: absolute;
            z-index: 1;
            width: 100%;
            height: 100%;
            background-color: #abf;
            display: flex;
            justify-content: center;
            align-items: center;
        }
    </style>
</head>

<body>
    <div class="doorWrap">
        <div class="leftDoor">左门</div>
        <div class="rightDoor">右门</div>
        <div class="content">欢迎光临，客官里边请...</div>
    </div>
</body>

</html>

    10_吃豆人效果

    效果图

    代码

    <!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>Document</title>
    <style>
        .pacMan {
            display: inline-block;
            position: relative;
            margin: 120px;
        }

        /* 使用伪元素创建吃豆人的眼睛 */
        .pacMan::before {
            content: '';
            width: 0.4em;
            height: 0.4em;
            border-radius: 50%;
            background-color: #333;
            position: absolute;
            top: 6px;
            left: 21px;
            z-index: 2000;
        }

        /* mouth1搭配mouth2组成吃豆人张嘴闭嘴的动画 */
        .mouth1 {
            width: 0;
            height: 0;
            border: 25px solid #E1B204;
            border-radius: 50%;
            border-right-color: transparent;
            animation: upup .32s 0s infinite;
            position: relative;
            z-index: 3;
        }

        @keyframes upup {
            0% {
                transform: rotate(270deg);
            }

            50% {
                transform: rotate(1turn);
            }

            100% {
                transform: rotate(270deg);
            }
        }

        .mouth2 {
            width: 0;
            height: 0;
            border: 25px solid #E1B204;
            border-right-color: transparent;
            border-radius: 25px;
            margin-top: -50px;
            animation: downdown .32s 0s infinite;
            position: relative;
            z-index: 3;
        }

        @keyframes downdown {
            0% {
                transform: rotate(90deg);
            }

            50% {
                transform: rotate(0);
            }

            100% {
                transform: rotate(90deg);
            }
        }

        /* 豆子不断移动 */
        .beanOne {
            background-color: #E1B204;
            border-radius: 50%;
            width: 10px;
            height: 10px;
            position: absolute;
            transform: translateY(-6px);
            top: 25px;
            left: 100px;
            animation: beanAnimation 1s linear .52s infinite;
        }

        .beanTwo {
            background-color: #E1B204;
            border-radius: 50%;
            width: 10px;
            height: 10px;
            position: absolute;
            transform: translateY(-6px);
            top: 25px;
            left: 100px;
            animation: beanAnimation 1s linear 1.1s infinite;
        }


        @keyframes beanAnimation {
            75% {
                opacity: .72;
            }

            100% {
                transform: translate(-100px, -6px);
            }
        }
    </style>
</head>

<body>
    <div class="pacMan">
        <div class="eye"></div>
        <div class="mouth1"></div>
        <div class="mouth2"></div>
        <div class="beanOne"></div>
        <div class="beanTwo"></div>
    </div>
</body>

</html>

    11_背景颜色流动效果

    效果图

    代码

    <!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>Document</title>
    <style>
        .bg {
            margin: 60px;
            width: 32%;
            height: 48vh;
            background: linear-gradient(-45deg, #dae, #f66, #3c9, #09f, #66f);
            background-size: 200% 200%;
            animation: gradient 8s ease infinite;
        }

        @keyframes gradient {
            0% {
                background-position: 0 12%;
            }

            50% {
                background-position: 100% 100%;
            }

            100% {
                background-position: 0 12%;
            }
        }
    </style>
</head>

<body>
    <div class="bg"></div>
</body>

</html>

    12_小球转圈加载效果

    效果图

    代码

    <!DOCTYPE html>
<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">
    <title>Document</title>
    <style>
        .wrap {
            margin: 120px 0 0 240px;
            width: 75px;
            height: 75px;
            position: relative;
            /* transform-origin: 设置的效果搭配边框看，效果更加明显 */
            /* border: 1px solid #e9e9e9; */
        }

        .round {
            position: absolute;
            width: 13px;
            height: 13px;
            border-radius: 50%;
            background-color: rgb(241, 141, 157);
            /* 加上动画效果 */
            animation: circleRound 2.8s ease infinite;
            /* 设置旋转中心，搭配.wrap的border看 */
            transform-origin: 50% 75px;
        }

        /* 注意z-index层级关系，依次递减 */
        .round:nth-child(1) {
            z-index: 7;
        }

        /* 注意动画延后animation-delay播放，依次递增 */
        /* 至于小圆球则越来越小 */
        .round:nth-child(2) {
            height: 12px;
            width: 12px;
            background-color: rgb(199, 136, 185);
            animation-delay: .2s;
            z-index: 6;
        }

        .round:nth-child(3) {
            height: 11px;
            width: 11px;
            background-color: rgb(153, 69, 223);
            animation-delay: .4s;
            z-index: 5;
        }

        .round:nth-child(4) {
            height: 10px;
            width: 10px;
            background-color: rgb(69, 141, 223);
            animation-delay: .6s;
            z-index: 4;
        }

        .round:nth-child(5) {
            height: 9px;
            width: 9px;
            background-color: rgb(69, 223, 203);
            animation-delay: .8s;
            z-index: 3;
        }

        .round:nth-child(6) {
            height: 8px;
            width: 8px;
            background-color: rgb(100, 223, 69);
            animation-delay: 1s;
            z-index: 2;
        }

        .round:nth-child(7) {
            height: 7px;
            width: 7px;
            background-color: rgb(223, 200, 69);
            animation-delay: 1.2s;
            z-index: 1;
        }

        @keyframes circleRound {
            to {
                transform: rotate(1turn);
            }
        }
    </style>
</head>

<body>
    <div class="wrap">
        <div class="round"></div>
        <div class="round"></div>
        <div class="round"></div>
        <div class="round"></div>
        <div class="round"></div>
        <div class="round"></div>
        <div class="round"></div>
    </div>
</body>

</html>

    13_钟摆效果

    效果图

    代码

    <!DOCTYPE html>
<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">
    <title>Document</title>
    <style>
        /* 画一条钟摆线条 */
        .line {
            margin: 24px 0 0 320px;
            width: 6px;
            height: 320px;
            background: #baf;
            border-radius: 8px;
            /* 钟摆动画周期两秒、匀速运动、无限循环 */
            animation: pendulum 3s linear infinite;
            /* 旋转以上方中间为中心进行旋转，因为默认是中间中心旋转 */
            transform-origin: top;
            /* 注意因为钟摆的小球是使用伪元素画的，故这里要加上定位 */
            position: relative;
        }

        /* 使用伪元素画钟摆小球，这样在旋转的时候，小球就一致跟着钟摆线了 */
        .line::after {
            content: '';
            width: 32px;
            height: 32px;
            border-radius: 50%;
            background-color: #faa;
            /* 伪元素搭配定位方便调整小球的位置 */
            position: absolute;
            bottom: 0;
            left: -12px;
        }

        /* 钟摆动画rotate旋转起来 */
        @keyframes pendulum {
            0% {
                transform: rotate(0deg);
            }

            25% {
                transform: rotate(45deg);
            }

            50% {
                transform: rotate(0deg);
            }

            75% {
                transform: rotate(-45deg);
            }

            100% {
                transform: rotate(0deg);
            }
        }
    </style>
</head>

<body>
    <div class="line"></div>
</body>

</html>

    14_文字烟雾消散效果

    效果图

    代码

    <!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>Document</title>
    <style>
        /* 主要是text-shadow和transform搭配动画的巧妙运用 */
        .wrap {
            width: 600px;
            height: 480px;
            box-sizing: border-box;
            padding: 120px;
            background-color: #000;
            color: transparent;
            display: flex;
        }

        h3 {
            text-shadow: 0 0 0 #fff;
            animation: smoky 6s infinite;
        }

        @keyframes smoky {
            60% {
                text-shadow: 0 0 40px #fff;
            }

            100% {
                text-shadow: 0 0 20px #fff;
                /* 这里是重点 */
                transform: translate3d(15rem, -8rem, 0) rotate(-40deg) skew(70deg) scale(1.5);
                opacity: 0;
            }
        }

        h3:nth-child(1) {
            animation-delay: 1s;
        }

        h3:nth-child(2) {
            animation-delay: 1.4s;
        }

        h3:nth-child(3) {
            animation-delay: 1.8s;
        }

        h3:nth-child(4) {
            animation-delay: 2.2s;
        }

        h3:nth-child(5) {
            animation-delay: 2.6s;
        }
    </style>
</head>

<body>
    <div class="wrap">
        <h3>代码</h3>
        <h3>修仙</h3>
        <h3>之路</h3>
        <h3>道阻</h3>
        <h3>且长...</h3>
    </div>
</body>

</html>

    15_水平左右抖动效果

    效果图

    代码

    <!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>Document</title>
    <style>
        body {
            box-sizing: border-box;
            padding: 120px;
        }

        .target {
            width: 48px;
            height: 48px;
            line-height: 48px;
            text-align: center;
            font-weight: bold;
            color: red;
            background: #baf;
            transform-origin: bottom;
            animation: shaking 1.2s ease-in-out infinite;
            /* 初始暂停播放，后续通过js控制播放 */
            animation-play-state: paused;
        }

        /* 通过translate3d的x轴移动去控制水平移动抖动效果 */
        @keyframes shaking {

            10%,
            90% {
                transform: translate3d(-1.2px, 0, 0);
            }

            20%,
            80% {
                transform: translate3d(2px, 0, 0);
            }

            30%,
            70% {
                transform: translate3d(-4.8px, 0, 0);
            }

            40%,
            60% {
                transform: translate3d(4.8px, 0, 0);
            }

            50% {
                transform: translate3d(-4.8px, 0, 0);
            }
        }
    </style>
</head>

<body>
    <div class="target">^_^</div>
    <br>
    <button class="start">动画开始</button>
    <button class="pause">动画暂停</button>
    <script>
        // js去设置animationPlayState属性值从而控制动画播放
        let startBtn = document.querySelector('.start')
        let pauseBtn = document.querySelector('.pause')
        let target = document.querySelector('.target')
        startBtn.onclick = () => {
            target.style.animationPlayState = 'running'
        }
        pauseBtn.onclick = () => {
            target.style.animationPlayState = 'paused'
        }
    </script>
</body>

</html>

    16_垂直方向坠落弹跳效果

    效果图

    代码

    <!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>Document</title>
    <style>
        body {
            box-sizing: border-box;
            padding: 120px;
        }

        .target {
            background: #666;
            width: 108px;
            height: 60px;
            border-radius: 60px;
            color: aliceblue;
            font-weight: bolder;
            line-height: 60px;
            text-align: center;
        }

        .animationClass {
            animation: 1.2s ease 0s infinite backwards bounce;
        }


        /* 主要是通过控制translateY的值来操作y轴的距离实现弹跳效果 */
        @keyframes bounce {
            0% {
                transform: translateY(-64px);
                animation-timing-function: ease-in;
                opacity: 1;
            }

            24% {
                opacity: 1;
            }

            40% {
                transform: translateY(-32px);
                animation-timing-function: ease-in;
            }

            62% {
                transform: translateY(-16px);
                animation-timing-function: ease-in;
            }

            82% {
                transform: translateY(-8px);
                animation-timing-function: ease-in;
            }

            92% {
                transform: translateY(-4px);
                animation-timing-function: ease-in;
            }

            25%,
            55%,
            75%,
            90% {
                transform: translateY(0);
                animation-timing-function: ease-out;
            }

            100% {
                transform: translateY(0);
                animation-timing-function: ease-out;
                opacity: 1;
            }
        }
    </style>
</head>

<body>
    <div class="target">O__O</div>
    <br>
    <button class="start">动画开始</button>
    <button class="end">动画结束</button>
    <script>
        let startBtn = document.querySelector('.start')
        let endBtn = document.querySelector('.end')
        let targetBox = document.querySelector('.target')
        // 通过dom的classList的API去控制动画的开始和结束(添加类移除类)
        startBtn.onclick = () => {
            targetBox.classList.add('animationClass')
        }
        endBtn.onclick = () => {
            targetBox.classList.remove('animationClass')
        }
    </script>
</body>

</html>

    17_仿figma加载中盒子转圈效果

    效果图

    代码

    <!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>Document</title>
    <style>
        body {
            padding: 120px;
        }

        .borderDom {
            position: relative;
            width: 18px;
            height: 10px;
            border-radius: 10px;
            border: 2px solid #333;
            animation: oneAnimation 4s cubic-bezier(.12, 0, .39, 0) infinite;
        }

        /* 中间的线使用定位调整到中间位置 */
        .middleLine {
            position: absolute;
            left: 8px;
            width: 2px;
            height: 10px;
            background-color: #333;
            animation: twoAnimation 4s cubic-bezier(.12, 0, .39, 0) infinite;
        }

        /* 外边框使用X轴方向的缩放 */
        @keyframes oneAnimation {
            0% {
                transform: scaleX(.5);
            }

            5% {
                transform: scaleX(1);
            }

            10% {
                transform: scaleX(.5);
            }

            15% {
                transform: scaleX(1);
            }

            20% {
                transform: scaleX(.5);
            }

            25% {
                transform: scaleX(1);
            }

            75% {
                transform: scaleX(1);
            }

            80% {
                transform: scaleX(.5);
            }

            85% {
                transform: scaleX(1);
            }

            90% {
                transform: scaleX(.5);
            }

            95% {
                transform: scaleX(1);
            }

            100% {
                transform: scaleX(.5);
            }
        }

        /* 中间线使用translate移动达到效果 */
        @keyframes twoAnimation {
            0% {
                transform: translate(-9px);
            }

            5% {
                transform: translate(0);
            }

            10% {
                transform: translate(9px);
            }

            10.1% {
                transform: translate(-9px);
            }

            15% {
                transform: translate(0);
            }

            20% {
                transform: translate(9px);
            }

            20.1% {
                transform: translate(-9px);
            }

            25% {
                transform: translate(0);
            }

            75% {
                transform: translate(0);
            }

            80% {
                transform: translate(9px);
            }

            80.1% {
                transform: translate(-9px);
            }

            85% {
                transform: translate(0);
            }

            90% {
                transform: translate(9px);
            }

            90.1% {
                transform: translate(-9px);
            }

            95% {
                transform: translate(0);
            }

            100% {
                transform: translate(9px);
            }
        }
    </style>
</head>

<body>
    <div class="borderDom">
        <div class="middleLine"></div>
    </div>
</body>

</html>

    18_文字横向伸展模糊淡入淡出效果

    效果图

    代码

    <!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>Document</title>
    <style>
        .enter {
            margin-top: 120px;
            text-align: center;
            /* 贝塞尔曲线动画 */
            animation: enterenter 1.8s infinite cubic-bezier(0.250, 0.460, 0.450, 0.940) both;
        }

        @keyframes enterenter {
            0% {
                /* 加上文字间距 */
                letter-spacing: 1em;
                /* Z轴变换 */
                transform: translateZ(300px);
                /* filter: blur(); 像素模糊效果 */
                filter: blur(12px);
                /* 透明度也要改变 */
                opacity: 0;
            }

            100% {
                transform: translateZ(12px);
                filter: blur(0);
                opacity: 1;
            }
        }

        .leave {
            text-align: center;
            animation: leaveleave 1.8s infinite cubic-bezier(0.250, 0.460, 0.450, 0.940) both;
        }

        @keyframes leaveleave {
            0% {
                transform: translateZ(0);
                filter: blur(0.01);
            }

            100% {
                letter-spacing: 1em;
                transform: translateZ(300px);
                filter: blur(12px) opacity(0%);
            }
        }
    </style>
</head>

<body>
    <h2 class="enter">早上好，程序猿兽们</h2>
    <br>
    <h2 class="leave">晚上好，程序猿兽们</h2>
</body>

</html>

    19_四个方向盒子旋转移动进入效果

    效果图

    代码

    <!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>Document</title>
    <style>
        body {
            overflow: hidden;
        }

        .target1 {
            width: 72px;
            height: 72px;
            background-color: #baf;
            /* 左侧滚动旋转进入 */
            animation: leftEnter 1.5s infinite ease-out both;
            position: absolute;
            left: 45%;
            top: 30%;
        }

        @keyframes leftEnter {
            0% {
                transform: translateX(-1000px) rotate(-540deg);
                opacity: 0;
            }

            100% {
                transform: translateX(0) rotate(0deg);
                opacity: 1;
            }
        }

        .target2 {
            width: 72px;
            height: 72px;
            background-color: #abf;
            /* 右侧滚动旋转进入 */
            animation: rightEnter 1.5s infinite ease-out both;
            position: absolute;
            left: 45%;
            top: 40%;
        }

        @keyframes rightEnter {
            0% {
                transform: translateX(1000px) rotate(540deg);
                opacity: 0;
            }

            100% {
                transform: translateX(0) rotate(0deg);
                opacity: 1;
            }
        }

        .target3 {
            width: 72px;
            height: 72px;
            background-color: pink;
            /* 上方滚动旋转进入 */
            animation: topEnter 1.5s infinite ease-out both;
            position: absolute;
            left: 45%;
            top: 50%;
        }

        @keyframes topEnter {
            0% {
                transform: translateY(-800px) rotate(540deg);
                opacity: 0;
            }

            100% {
                transform: translateX(0) rotate(0deg);
                opacity: 1;
            }
        }

        .target4 {
            width: 72px;
            height: 72px;
            background-color: rgb(211, 140, 233);
            /* 下方滚动旋转进入 */
            animation: bottomEnter 1.5s infinite ease-out both;
            position: absolute;
            left: 45%;
            top: 20%;
        }

        @keyframes bottomEnter {
            0% {
                transform: translateY(1200px) rotate(540deg);
                opacity: 0;
            }

            100% {
                transform: translateX(0) rotate(0deg);
                opacity: 1;
            }
        }
    </style>
</head>

<body>
    <div class="target1"></div>
    <div class="target2"></div>
    <div class="target3"></div>
    <div class="target4"></div>
</body>

</html>

    20_按钮点击波纹效果

    效果图

    代码

    <!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>Document</title>
    <style>
        body {
            padding: 120px;
            background-color: #999;
        }

        button {
            margin: 8px;
            width: 120px;
            height: 48px;
            background-color: #faa;
            color: #fff;
            border: none;
            border-radius: 12px;
            cursor: pointer;
            /* 开启定位是为了给波纹动画元素使用 */
            position: relative;
            /* 必须加上超出隐藏，注释掉以后效果很明显 */
            overflow: hidden;
            /* hover过渡一下 */
            transition: all 0.3s;
        }

        button:hover {
            box-shadow: 0 0 18px rgba(255, 255, 255, 0.36);
        }

        .btn2 {
            background-color: violet;
        }

        .btn3 {
            background-color: rgb(231, 116, 164);
        }

        .btn4 {
            background-color: rgb(116, 204, 231);
        }

        .btn5 {
            background-color: rgb(54, 134, 58);
        }

        .btn6 {
            background-color: rgb(224, 126, 45);
        }

        .ripple {
            position: absolute;
            border-radius: 50%;
            background-color: rgba(255, 255, 255, 0.48);
            transform: scale(0);
            animation: ripple 240ms linear;
        }

        @keyframes ripple {
            to {
                transform: scale(2.4);
                opacity: 0.12;
            }
        }
    </style>
</head>

<body>
    <button class="targetBtn">点击波纹效果</button>
    <button class="targetBtn btn2">点击波纹效果</button>
    <button class="targetBtn btn3">点击波纹效果</button>
    <button class="targetBtn btn4">点击波纹效果</button>
    <button class="targetBtn btn5">点击波纹效果</button>
    <button class="targetBtn btn6">点击波纹效果</button>
    <script>
        // 创建波纹函数，只要一点击就创建一个波纹
        function createRipple(event) {
            const button = event.target; // 获取事件对象button按钮
            const circle = document.createElement("div"); // 创建一个div标签用于表示一个波纹（波纹就是一个圆）
            const diameter = Math.max(button.clientWidth, button.clientHeight); // 取dom宽度和高度中的一个最大值，以最大值做直径
            const radius = diameter / 2; // 直径除以2即为半径 （若不理解这几行，可注释掉overflow: hidden;再点击按钮即明白）
            circle.style.width = circle.style.height = `${diameter}px`; // 以直径作为宽高
            circle.style.left = `${event.clientX - button.offsetLeft - radius}px`; // 设置定位的位置
            circle.style.top = `${event.clientY - button.offsetTop - radius}px`;
            circle.classList.add("ripple"); // classList加上类名既有动画效果了
            // 若有这个波纹动画圆dom以后，就移除这个dom再追加。若没有直接追加
            let ripple = button.querySelector('.ripple')
            if (ripple) {
                ripple.remove();
            }
            button.appendChild(circle); // 将这个波纹动画圆作为子元素追加到父元素button上（这样父元素相对定位，子元素绝对定位就生效了）
        }
        // 1. 获取将要点击的按钮dom数组
        const targetBtnArr = document.querySelectorAll('.targetBtn')
        // 2. 给数组中的每一项，即要点击的按钮dom绑定点击监听事件
        for (let i = 0; i < targetBtnArr.length; i++) {
            let targetBtn = targetBtnArr[i]
            targetBtn.addEventListener("click", createRipple);
        }
    </script>
</body>


</html>

    21_鼠标悬浮按钮边框线条动画效果

    效果图

    代码

    <!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>Document</title>
    <style>
        body {
            background: #faa;
            padding: 120px;
        }

        button {
            display: inline-block;
            border: none;
            color: #fff;
            cursor: pointer;
            margin: 12px 18px;
            background: rgb(201, 108, 234);
            position: relative;
        }

        span {
            display: block;
            padding: 18px 60px
        }

        button::before,
        button::after {
            content: "";
            width: 0;
            height: 2px;
            position: absolute;
            transition: all .2s linear;
            background: #fff
        }

        span::before,
        span::after {
            content: "";
            width: 2px;
            height: 0;
            position: absolute;
            transition: all .2s linear;
            background: #fff
        }

        button:hover::before,
        button:hover::after {
            width: 100%
        }

        button:hover span::before,
        button:hover span::after {
            height: 100%
        }

        .btn1::before,
        .btn1::after {
            transition-delay: .2s
        }

        .btn1 span::before,
        .btn1 span::after {
            transition-delay: 0s
        }

        .btn1::before {
            right: 0;
            top: 0
        }

        .btn1::after {
            left: 0;
            bottom: 0
        }

        .btn1 span::before {
            left: 0;
            top: 0
        }

        .btn1 span::after {
            right: 0;
            bottom: 0
        }

        .btn1:hover::before,
        .btn1:hover::after {
            transition-delay: 0s
        }

        .btn1:hover span::before,
        .btn1:hover span::after {
            transition-delay: .2s
        }

        .btn2::before,
        .btn2::after {
            transition-delay: 0s
        }

        .btn2 span::before,
        .btn2 span::after {
            transition-delay: .2s
        }

        .btn2::before {
            right: 0;
            top: 0
        }

        .btn2::after {
            left: 0;
            bottom: 0
        }

        .btn2 span::before {
            left: 0;
            top: 0
        }

        .btn2 span::after {
            right: 0;
            bottom: 0
        }

        .btn2:hover::before,
        .btn2:hover::after {
            transition-delay: .2s
        }

        .btn2:hover span::before,
        .btn2:hover span::after {
            transition-delay: 0s
        }

        .btn3::after {
            left: 0;
            bottom: 0;
            transition-delay: .6s
        }

        .btn3 span::after {
            transition-delay: .4s;
            right: 0;
            bottom: 0
        }

        .btn3::before {
            right: 0;
            top: 0;
            transition-delay: .2s
        }

        .btn3 span::before {
            transition-delay: 0s;
            left: 0;
            top: 0
        }

        .btn3:hover::after {
            transition-delay: 0s
        }

        .btn3:hover span::after {
            transition-delay: .2s
        }

        .btn3:hover::before {
            transition-delay: .4s
        }

        .btn3:hover span::before {
            transition-delay: .6s
        }

        .btn4::after {
            right: 0;
            bottom: 0;
            transition-duration: .4s
        }

        .btn4 span::after {
            right: 0;
            bottom: 0;
            transition-duration: .4s
        }

        .btn4::before {
            left: 0;
            top: 0;
            transition-duration: .4s
        }

        .btn4 span::before {
            left: 0;
            top: 0;
            transition-duration: .4s
        }

        .btn5::after {
            left: 0;
            bottom: 0;
            transition-duration: .4s
        }

        .btn5 span::after {
            right: 0;
            top: 0;
            transition-duration: .4s
        }

        .btn5::before {
            right: 0;
            top: 0;
            transition-duration: .4s
        }

        .btn5 span::before {
            left: 0;
            bottom: 0;
            transition-duration: .4s
        }

        .btn6::before {
            left: 50%;
            top: 0;
            transition-duration: .4s
        }

        .btn6::after {
            left: 50%;
            bottom: 0;
            transition-duration: .4s
        }

        .btn6 span::before {
            left: 0;
            top: 50%;
            transition-duration: .4s
        }

        .btn6 span::after {
            right: 0;
            top: 50%;
            transition-duration: .4s
        }

        .btn6:hover::before,
        .btn6:hover::after {
            left: 0
        }

        .btn6:hover span::before,
        .btn6:hover span::after {
            top: 0
        }
    </style>
</head>

<body>
    <main>
        <button class="btn1"><span>悬浮上左、下右</span></button>
        <button class="btn2"><span>悬浮右上、左下</span></button>
        <button class="btn3"><span>悬浮之一圈线条</span></button>
        <button class="btn4"><span>悬浮右下角和左上角两个方向延伸</span></button>
        <button class="btn5"><span>悬浮右上角和左下角两个方向延伸</span></button>
        <button class="btn6"><span>悬浮四个方向中间点往两端延伸</span></button>
    </main>
</body>

</html>

    22_灯泡开关效果

    效果图

    代码

    <!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>Document</title>
    <style>
        /* :root全局css变量搭配var()函数使用 */
        :root {
            --light-color: #fff
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        body {
            width: 100%;
            height: 100vh;
        }

        .container {
            width: 100%;
            height: 100%;
            display: flex;
        }

        .light-container {
            width: 100%;
            display: flex;
            justify-content: center;
            align-items: center;
            background-color: #333;
        }

        .light {
            position: absolute;
            width: 80px;
            height: 80px;
            border-radius: 50%;
            background-color: var(--light-color);
            transition: all 0.24s;

        }

        .light::before {
            content: '';
            position: absolute;
            width: 35px;
            height: 80px;
            border-radius: 10px;
            background: var(--light-color);
            left: 27.5%;
            top: -50px;
            border-top: 30px solid black;
        }

        .light span:nth-child(1) {
            position: absolute;
            width: 30px;
            height: 30px;
            background: transparent;
            box-shadow: 20px 20px 0 10px var(--light-color);
            border-bottom-right-radius: 40px;
            left: -4px;
            top: -16px;
            transform: rotate(342deg);
        }

        .light span:nth-child(2) {
            position: absolute;
            width: 30px;
            height: 30px;
            background: transparent;
            box-shadow: -20px 20px 0 10px var(--light-color);
            border-bottom-left-radius: 40px;
            right: -3.4px;
            top: -16px;
            transform: rotate(16deg);
        }

        .wire {
            width: 4px;
            height: 400px;
            background-color: #8f8e8e;
            top: -18%;
            position: absolute;
            transition: all 0.24s;
        }

        .light::after {
            position: absolute;
            content: '';
            width: 140px;
            height: 140px;
            background: var(--light-color);
            border-radius: 50%;
            top: 50%;
            left: 0;
            filter: blur(40px);
            transform: translate(-18%, -40px);
            box-shadow: 0 0 10px var(--light-color),
                0 0 30px var(--light-color),
                0 0 60px var(--light-color),
                0 0 120px var(--light-color),
                0 0 200px var(--light-color),
            ;
        }

        button {
            position: absolute;
            bottom: 240px;
            right: 240px;
            width: 120px;
            height: 36px;
        }
    </style>
</head>

<body>
    <div class="container">
        <div class="light-container">
            <div class="wire"></div>
            <div class="light">
                <span></span>
                <span></span>
            </div>
        </div>
    </div>
    <button>开关按钮</button>
    <script>
        let switchOn = true
        let btn = document.querySelector('button')
        let light = document.querySelector('.light')
        let wire = document.querySelector('.wire')
        btn.onclick = () => {
            switchOn = !switchOn
            if (switchOn) {
                document.documentElement.style.setProperty('--light-color', '#fff')
                wire.style.background = '#8f8e8e'
                document.styleSheets[0].addRule('.light::before', 'border-top: 30px solid #000');
            } else {
                document.documentElement.style.setProperty('--light-color', '#333')
                wire.style.background = '#333'
                document.styleSheets[0].addRule('.light::before', 'border-top: 30px solid #333');
            }
        }
        // 使用js动态给伪元素设置样式，参见文章：http://t.zoukankan.com/kunmomo-p-12358005.html
        // 另外样式表也是一个对象，也可以打印 document.querySelector('style') 可访问其上的css属性
    </script>
</body>

</html>

    23_鼠标悬浮手风琴样式展开图标效果图

    效果图

    代码

    <!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>Document</title>
    <style>
        body {
            padding: 180px;
            background-color: #ddd;
        }

        .item {
            box-sizing: border-box;
            display: inline-flex;
            align-items: center;
            height: 60px;
            /* 手风琴效果就是鼠标悬浮宽度过渡 */
            width: 60px;
            margin: 4px 8px;
            /* 超出隐藏，因为要把伪元素文字遮挡住 */
            overflow: hidden;
            background: #fff;
            border-radius: 30px;
            box-shadow: 0px 10px 10px rgba(0, 0, 0, 0.24);
            transition: all 0.5s;
        }

        .item:hover {
            width: 180px;
            border: none;
        }

        /* 悬浮加背景色 */
        .first:hover .icon {
            background-color: pink;
        }

        .second:hover .icon {
            background-color: #e9e9e9;
        }

        .third:hover .icon {
            background-color: pink;
        }

        .fouth:hover .icon {
            background-color: #e9e9e9;
        }

        .icon {
            width: 60px;
            height: 60px;
            display: flex;
            justify-content: center;
            align-items: center;
            border-radius: 30px;
            font-size: 28px;
            position: relative;
            transition: all 0.5s;
            /* 真实元素阻止鼠标事件，伪元素自动鼠标事件 */
            pointer-events: none;
        }

        /* 通过伪元素添加内容介绍文字 */
        .item:nth-child(1) .icon::after {
            position: absolute;
            content: '我是红桃';
            /* 宽度随着内容自适应 */
            width: fit-content;
            /* 文字不换行 */
            word-break: keep-all;
            /* 设置伪元素文字大小为中等大小 */
            font-size: medium;
            left: 72px;
            /* 真实元素阻止鼠标事件，伪元素自动鼠标事件 */
            pointer-events: auto;
            cursor: pointer;
        }

        .item:nth-child(2) .icon::after {
            position: absolute;
            content: '我是黑桃';
            width: fit-content;
            word-break: keep-all;
            font-size: medium;
            left: 72px;
            pointer-events: auto;
            cursor: pointer;
        }

        .item:nth-child(3) .icon::after {
            position: absolute;
            content: '我是方块';
            width: fit-content;
            word-break: keep-all;
            font-size: medium;
            left: 72px;
            pointer-events: auto;
            cursor: pointer;
        }

        .item:nth-child(4) .icon::after {
            position: absolute;
            content: '我是梅花';
            width: fit-content;
            word-break: keep-all;
            font-size: medium;
            left: 72px;
            pointer-events: auto;
            cursor: pointer;
        }

        /* 鼠标悬浮加文字下划线（给伪元素添加hover样式） */
        .icon:hover::after {
            text-decoration: underline;
        }
    </style>
</head>

<body>
    <div class="item first">
        <div onclick="clickAfter('红桃')" style="color: #DD3B32;" class="icon">♥</div>
    </div>
    <div class="item second">
        <div onclick="clickAfter('黑桃')" style="color: #1A1A1A;" class="icon">♠</div>
    </div>
    <div class="item third">
        <div onclick="clickAfter('方块')" style="color: #FB1C17;" class="icon">♦</div>
    </div>
    <div class="item fouth">
        <div onclick="clickAfter('梅花')" style="color: #090B0A;" class="icon">♣</div>
    </div>
    <script>
        /**
         * 注意伪元素也可以绑定事件
         *      只需：真实元素 pointer-events: none;
         *            伪元素 pointer-events: auto;
         * 参见文章：https://www.cnblogs.com/letgofishing/p/15987190.html
         * */
        function clickAfter(who) {
            console.log(who);
        }
    </script>
</body>

</html>
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    水冗水孚
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