6.属性选择器(重要)

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>属性选择器(重要)</title>

    <style>
        .demo a{
            float: left;
            display: block;
            height: 50px;
            width: 50px;
            border-radius: 10px;
            background: #699ce7;
            text-align: center;
            color: gray;
            text-decoration: none;
            margin-right: 5px;
            font: bold 20px/50px Arial;
        }

        /* 存在id属性的元素 */
        a[id]{
            background: yellow;
        }
        /* 存在id属性的且id名称是idName2 */
        a[id=idName2]{
            background: yellow;
        }

        /* class中包含有links的元素
            = 绝对等于
            *= 包含等于
            ^= 以什么开头
            $= 以设么结尾
         */
        a[class *= "links"]{
            background: red;
        }

        /* 选中href中已http开头的元素 */
        a[href^=http]{
            background: gray;
        }
    </style>

</head>
<body>

<p class="demo">

    <a href="https://www.baidu.com" class="links item first" id="idName1">1</a>
    <a href="" class="links item active" target="_blank" title="test" id="idName2">2</a>
    <a href="images/123.html" class="links item">3</a>
    <a href="images/123.png" class="links item">4</a>
    <a href="images/123.jpg" class="links item">5</a>
    <a href="abc" class="links item">6</a>
    <a href="/a.pdf" class="links item">7</a>
    <a href="/abc.pdf" class="links item">8</a>
    <a href="abc.doc" class="links item">9</a>
    <a href="abcd.doc" class="links item last">10</a>

</p>

</body>
</html>

 

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