伪元素before\after添加的内容是父类的子级，在父类的盒子内部

况几

于 2022-04-09 16:53:13 发布

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分类专栏：学习记录文章标签：前端 html css3

本文链接：https://blog.youkuaiyun.com/angrynouse/article/details/124063586

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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>
        .father{
            width: 500px;
            height: 500px;
            background-color: #e0e0e0;
            /* 下面三行是内容居中代码，可忽略 */
            display: flex;
            justify-content: center;
            align-items: center;
        }
        .father .selfSon{
            display: inline-block;
            background-color: skyblue;
            width: 200px;
            height: 200px;
        }
        
        /*伪元素*/
        .father::before{
            content: "before内容";
            width: 200px;
            height: 200px;
            background-color: pink;
        }
        .father::after{     
            content: "after内容";
            width: 200px;
            height: 200px;
            background-color: pink;
        }
    </style>
</head>

<body>
    <div class="father">
        <div class="selfSon">父级中自身的内容</div>
    </div>
</body>

</html>