css实现会转动的阴阳图

时间 2019-11-07 标签 css 实现转动阴阳

下面的::before和::after不懂能够去看看以前的那一篇关于伪元素的文章便可理解。使用伪元素的好处是能够少用几个div元素。html

<!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>阴阳图</title>
    <style>
        body {
            background-color: #dfdfdf
        }

        @keyframes spin {
            from {
                transform: rotate(0deg);
            }

            to {
                transform: rotate(360deg);
            }
        }

        .yinyang {
            width: 200px;
            height: 200px;
            border-radius: 50%;
            background: linear-gradient(to bottom, white 0%, white 50%, #0a020f 50%, #140b13 100%);
            margin: 0 auto;
            position: relative;
            animation-duration: 1s;
            animation-name: spin;
            animation-iteration-count: infinite;
            animation-timing-function: linear;
        }

        /* 使用border做为背景，那么里面的小圆圈只要设置背景颜色就能够了 */
        .yinyang::before {
            content: '';
            width: 20px;
            height: 20px;
            /* border: 1px solid red; */
            border-radius: 50%;
            position: absolute;
            background-color: white;
            top: 50px;
            border: 40px solid #140b13;
        }

        .yinyang::after {
            content: '';
            width: 20px;
            height: 20px;
            border-radius: 50%;
            position: absolute;
            background-color: #140b13;
            border: 40px solid white;
            top: 50px;
            left: 100px;
        }
    </style>
</head>

<body>
    <div class="yinyang">
        <!-- <div class="one">
            <div class="circle"></div>
        </div>
        <div class="two">
            <div class="circle"></div>
        </div> -->
    </div>
</body>

</html>

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