CSS3脉动甜甜圈

CSS3脉动甜甜圈

知识点分析：

水平，垂直居中

position: absolute;

top: 50%;

left: 50%;

transform: translateX(-50%) translateY(-50%);

设置多个径向渐变，指定背景显示大小，以60*60的区域，重复显示径向渐变形成的图案。

background-image: 

radial-gradient(#0fc 15%, transparent 16%),

radial-gradient(#ff0 15%, transparent 16%);

background-size: 60px 60px;

background-position: 0 0, 30px 30px;

html:

    <div class="container">
        <div class="donut__glazed"></div>
        <div class="donut__sprinkles"></div>
        <div class="donut__chocolate"></div>
    </div>

css:

    <style>
        *{
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body{
            width: 100vw;
            height: 100vh;
            background-color: #a2989d;
            display: flex;
            justify-content: center;
            align-items: center;
        }
        .container{
            width: 100%;
            height: 50vh;
            display: flex;
            justify-content: center;
            align-items: center;
        }
        [class*=donut] {
            width: 25vw;
            height: 25vw;
            border-radius:50%;
            margin: 1rem;
            float: left;
            position: relative;
        }
        .donut__glazed{
            background-color: #fff;
            border: 2vw solid #f5deb3;
            box-shadow: 0.5vw 0.5vw 0 rgba(0,0,0,0.1);
        }
        .donut__glazed::before{
            content: '';
            width: 5vw;
            height: 5vw;
            background-color: #a2988d;
            border: 2vw solid #f5deb3;
            border-radius: 50%;
            box-shadow: inset 0.5vw 0.5vw 0 rgba(0,0,0,0.1);
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translateX(-50%) translateY(-50%);
        }
        .donut__sprinkles{
            background-color: #ff748c;
            border: 2vw solid #f5deb3;
            box-shadow: 0.5vw 0.5vw 0 rgba(0,0,0,0.1);
            background-image: 
            radial-gradient(#0fc 15%, transparent 16%),
            radial-gradient(#ff0 15%, transparent 16%);
            background-size: 60px 60px;
            background-position: 0 0, 30px 30px;
        }
        .donut__sprinkles::before{
            content: '';
            width: 5vw;
            height: 5vw;
            background-color: #a2988d;
            border: 2vw solid #f5deb3;
            border-radius: 50%;
            box-shadow: inset 0.5vw 0.5vw 0 rgba(0,0,0,0.1);
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translateX(-50%) translateY(-50%);
        }



        .donut__chocolate{
            background-color: #372411;
            border: 2vw solid #613e1e;
            box-shadow: 0.5vw 0.5vw 0 rgba(0,0,0,0.1);
        }
        .donut__chocolate::before{
            content: '';
            width: 5vw;
            height: 5vw;
            background-color: #a2988d;
            border: 2vw solid #613e1e;
            border-radius: 50%;
            box-shadow: inset 0.5vw 0.5vw 0 rgba(0,0,0,0.1);
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translateX(-50%) translateY(-50%);
        }
    </style>