用偽元素製作列表選單

阿新 • • 發佈：2020-08-14

重點：

偽元素製作動態列表項中：content內容區使用arr（），可以製作動態資料新增

下面程式碼中的案例

<!-- 自定義屬性 屬性名自己定  -->
<a href="" class="clearfix" xh="11">

 /* attr(屬性名) 獲取該屬性名字對應的屬性值 */
content: attr(xh);

程式碼

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" 
 content="width=device-width, initial-scale=1.0">
    <title>偽元素列表選單</title>
    <style>
        * {
            padding: 0;
            margin: 0;
        }
        ul {
            list-style: none;
        }
        .list-box {
            width: 280px;
            height:auto;
            margin 
: 0 auto;
        }
        .item {
            width: 100%;
            height: 40px;
            line-height: 40px;
            margin-top: 20px;
        }
        /* 灰色盒子 */
        .item .name-box {

            width: 220px;
            height: 100%;
            border-radius: 3px;
            background-color 
: #edeeee;
            font-size: 18px;
            color: #333;
            float: left;
            padding-left: 20px;

        }
        /* 偽元素插入位置 a::before {} */
        .item a::before {
            /* content: '1'; */
            /* attr(屬性名) 獲取該屬性名字對應的屬性值 */
            content: attr(xh);
            width: 40px;
            height: 100%;
            /* display: block; */
            float: left;
            background-color: #404f60;
           color: #fff;
           line-height: 40px;
           text-align: center;
           border-radius: 4px;
        }
        .item:hover  .name-box {

            background-color: #cfd8dc;
            color: #fff;

        }
        .item:hover {
            height: 41px;
        }
        .item a {
            display: block;
        }
        .clearfix::after {
            content: '';
            display: block;
            clear:both;
        }
    </style>
</head>
<body>
    <ul class="list-box">
        <li class="item">
            <!-- 自定義屬性 屬性名自己定  -->
            <a href="" class="clearfix" xh="11">
                <!-- div :before -->
                <div class="name-box">Dr Nice</div>
            </a>
        </li>
        <li class="item">
            <a href="" class="clearfix" xh="12">
                <div class="name-box">Dr Nice</div>
            </a>
        </li>
        <li class="item">
            <a href="" class="clearfix" xh="13">
                <div class="name-box">Dr Nice</div>
            </a>
        </li>
        <li class="item" >
            <a href="" class="clearfix"  xh="14">
                <div class="name-box">Dr Nice</div>
            </a>
        </li>
        <li class="item">
            <a href="" class="clearfix"  xh="15">
                <div class="name-box">Dr Nice</div>
            </a>
        </li>
        <li class="item">
            <a href="" class="clearfix"  xh="16">
                <div class="name-box">Dr Nice</div>
            </a>
        </li>
        <li class="item">
            <a href="" class="clearfix"  xh="17">
                <div class="name-box">Dr Nice</div>
            </a>
        </li>
        <li class="item">
            <a href="" class="clearfix"  xh="18">
                <div class="name-box">Dr Nice</div>
            </a>
        </li>
        <li class="item">
            <a href="" class="clearfix"  xh="19">
                <div class="name-box">Dr Nice</div>
            </a>
        </li>
        <li class="item">
            <a href="" class="clearfix"  xh="20">
                <div class="name-box">Dr Nice</div>
            </a>
        </li>
    </ul>
</body>
</html>