CSS样式-伪对象的使用扩展

<!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 type="text/css">
        #container>li>.a {
            width: 100px;
            height: 100px;
            background-color: #f00;
        }

        #container>li>.a+div {
            width: 100px;
            height: 100px;
            background-color: #0f0;
        }

        .a~p {
            width: 100px;
            height: 100px;
            background-color: #00f;
        }

        /*div[class] {
            width: 100px;
            height: 100px;
            #000!important;
        }

        div[class~="a5"] {
            #ff0!important;
        }

        #container>li>p:nth-of-type(1) {
            #000!important;
        } */

        #container>li>.aaa {
            background-color: #0f0;
        }

        #container>li>.aaa::after {
            content: "----[after]";
            background-color: #ff0;
        }

        #container>li>.aaa::before {
            content: "[before]----";
            background-color: #ff0;
        }
    </style>
</head>
<body>
   <ul id="container">
        <li>
            <div class="a a5"></div>
            <div class="a5"></div>
            <div></div>
            <p></p>
            <p class="aaa">111</p>
        </li>
        <li>
            <div class="a"></div>
            <div></div>
            <p></p>
        </li>
        <li>
            <div class="a"></div>
            <div></div>
            <p></p>
        </li>
        <li>
            <div class="a"></div>
            <div></div>
            <p></p>
        </li>
        <li>
            <div class="a"></div>
            <div></div>
            <p></p>
        </li>
        <li>
            <div class="a"></div>
            <div></div>
            <p></p>
        </li>
   </ul>
</body>
</html>

 

 

posted @ 2021-04-10 18:11  #Friday  阅读(49)  评论(0)    收藏  举报