w-sir
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style type="text/css">
        * {
            margin: 0;
            padding: 0;
        }
        img{
            display: block;
        }
        #list{
            width: 150px;
            height: 150px;
            margin: 200px auto 50px;
            list-style: none;
            position: relative;
            transform-style: preserve-3d;
            /*景深*/
            /*景深数值越小 近大远小效果越明显*/
            perspective:1000px;
            /*测试*/
            transform: rotateX(0deg) rotateY(0deg);
        }
        #list li{
            width: 100%;
            height: 100%;
            position: absolute;
            left:0;
            top:0;
            transition: 1s;
        }
        #list li img{
            width: 100%;
            height: 100%;
        }
        div{
            text-align: center;
        }
    </style>
</head>
<body>
    <ul id="list">
        <li><img src="img/img11.jpg" alt=""></li>
        <li><img src="img/img12.jpg" alt=""></li>
        <li><img src="img/img13.jpg" alt=""></li>
        <li><img src="img/img14.jpg" alt=""></li>
        <li><img src="img/img15.jpg" alt=""></li>
        <li><img src="img/img16.jpg" alt=""></li>
        <li><img src="img/img17.jpg" alt=""></li>
        <li><img src="img/img18.jpg" alt=""></li>
        <li><img src="img/img19.jpg" alt=""></li>
    </ul>
    <div>
        <button id="btn">旋转</button>
    </div>
</body>
<script type="text/javascript">
    window.onload = function () {
      var liNodes = document.querySelectorAll(\'#list li\');
      var btn = document.getElementById(\'btn\');
//      给每一个li设置rotateY(40deg)
        for (var i = 0; i < liNodes.length; i++) {
            liNodes[i].style.transform = \'rotateY(\'+360/liNodes.length*i+\'deg) translateZ(300px)\'
        }
//        计数变量  记录单击次数
        var num = 0;
//        给旋转按钮绑定单击事件
        btn.onclick = function () {
          num++;
            for (var i = 0; i < liNodes.length; i++) {
                liNodes[i].style.transform = \'rotateY(\'+360/liNodes.length*(i+num)+\'deg) translateZ(300px)\'
            }
        }
    }
</script>
</html>

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