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  • demo55-固定定位

    <!DOCTYPE html>
    <html>
        <head>
            <meta charset="UTF-8">
            <title></title>
            <style type="text/css">
                span{
                    /*
                     * 固定定位 position: fixed;
                     * */
                    position: fixed;
                    width: 300px;
                    height: 300px;
                    background: pink;
                    right: 0px;
                    bottom: 0px;
                }
                p{
                    border: 1px solid black;
                }
            </style>
        </head>
        <body>
            <span>黑马程序员</span>
            <p>啦啦啦阿拉</p>
            <p>啦啦啦阿拉</p>
            <p>啦啦啦阿拉</p>
            <p>啦啦啦阿拉</p>
            <p>啦啦啦阿拉</p>
            <p>啦啦啦阿拉</p>
            <p>啦啦啦阿拉</p>
            <p>啦啦啦阿拉</p>
            <p>啦啦啦阿拉</p>
            <p>啦啦啦阿拉</p>
            <p>啦啦啦阿拉</p>
            <p>啦啦啦阿拉</p>
            <p>啦啦啦阿拉</p>
            <p>啦啦啦阿拉</p>
            <p>啦啦啦阿拉</p>
            <p>啦啦啦阿拉</p>
            <p>啦啦啦阿拉</p>
            <p>啦啦啦阿拉</p>
            <p>啦啦啦阿拉</p>
            <p>啦啦啦阿拉</p>
            <p>啦啦啦阿拉</p>
            <p>啦啦啦阿拉</p>
            <p>啦啦啦阿拉</p>
            <p>啦啦啦阿拉</p>
            <p>啦啦啦阿拉</p>
            <p>啦啦啦阿拉</p>
            <p>啦啦啦阿拉</p>
            <p>啦啦啦阿拉</p>
            <p>啦啦啦阿拉</p>
            <p>啦啦啦阿拉</p>
            <p>啦啦啦阿拉</p>
            <p>啦啦啦阿拉</p>
            <p>啦啦啦阿拉</p>
            <p>啦啦啦阿拉</p>
            <p>啦啦啦阿拉</p>
            <p>啦啦啦阿拉</p>
            <p>啦啦啦阿拉</p>
            <p>啦啦啦阿拉</p>
            <p>啦啦啦阿拉</p>
            <p>啦啦啦阿拉</p>
            <p>啦啦啦阿拉</p>
            <p>啦啦啦阿拉</p>
            <p>啦啦啦阿拉</p>
            <p>啦啦啦阿拉</p>
            <p>啦啦啦阿拉</p>
            <p>啦啦啦阿拉</p>
            <p>啦啦啦阿拉</p>
            <p>啦啦啦阿拉</p>
            <p>啦啦啦阿拉</p>
            <p>啦啦啦阿拉</p>
            <p>啦啦啦阿拉</p>
            <p>啦啦啦阿拉</p>
            <p>啦啦啦阿拉</p>
            <p>啦啦啦阿拉</p>
            <p>啦啦啦阿拉</p>
            <p>啦啦啦阿拉</p>
            <p>啦啦啦阿拉</p>
            <p>啦啦啦阿拉</p>
            <p>啦啦啦阿拉</p>
            <p>啦啦啦阿拉</p>
            <p>啦啦啦阿拉</p>
            <p>啦啦啦阿拉</p>
            <p>啦啦啦阿拉</p>
            <p>啦啦啦阿拉</p>
            <p>啦啦啦阿拉</p>
            <p>啦啦啦阿拉</p>
            <p>啦啦啦阿拉</p>
            <p>啦啦啦阿拉</p>
            <p>啦啦啦阿拉</p>
            <p>啦啦啦阿拉</p>
            <p>啦啦啦阿拉</p>
            <p>啦啦啦阿拉</p>
            <p>啦啦啦阿拉</p>
            <p>啦啦啦阿拉</p>
        </body>
    </html>
    <!--
        固定定位:固定不动的
        一般都是最重要的部分
        使用场景:
        1.在网站最重要的地方使用,比如招聘信息,招生信息等等
        2.小广告
        特点:
        固定定位:
        1.会占据位置不变
        2.可以设置宽度和高度
        span默认不会有宽和高
        3.会以body作为参照物<以可视化的东西为参照>
    -->

    演示效果:

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  • 原文地址:https://www.cnblogs.com/huaibin/p/12589750.html
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