css怎么设置悬浮效果-木庄网络博客

本文摘自PHP中文网，作者青灯夜游，侵删。

css设置悬浮效果的方法：首先给元素添加“position: fixed;”样式，固定元素的位置，让元素悬浮在页面中，不随浏览器窗口的滚动条滚动而变化；然后使用top、bottom、left、right属性设置元素的悬浮位置即可。

本教程操作环境：windows7系统、CSS3&&HTML5版、Dell G3电脑。

css设置悬浮效果（固定位置）

<!DOCTYPE html>
<html>
 
    <head>
        <meta charset="utf-8" />
        <meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1" />
        <title>DIV悬浮示例-纯CSS实现</title>
 
        <style type="text/css">
            /*设置了高度，可以上下滚动*/
             
            body {
                height: 1800px;
                background: #dddddd;
            }
            /*div通用样式*/
             
            div {
                background: #1a59b7;
                color: #ffffff;
                overflow: hidden;
                z-index: 9999;
                position: fixed;  /*DIV悬浮(固定位置)*/
                padding: 5px;
                text-align: center;
                width: 175px;
                height: 22px;
                border-bottom-left-radius: 4px;
                border-bottom-right-radius: 4px;
                border-top-left-radius: 4px;
                border-top-right-radius: 4px;
            }
            /*右上角*/
             
            div.right_top {
                right: 10px;
                top: 10px;
            }
            /*右下角*/
             
            div.right_bottom {
                right: 10px;
                bottom: 10px;
            }
            /*屏幕中间*/
             
            div.center_ {
                right: 45%;
                top: 50%;
            }
            /*左上角*/
             
            div.left_top {
                left: 10px;
                top: 10px;
            }
            /*左下角*/
             
            div.left_bottom {
                left: 10px;
                bottom: 10px;
            }
        </style>
 
    </head>
 
    <body>
        <div class="right_top"> 我是右上角悬浮的div</div>
        <div class="right_bottom"> 我是右下角悬浮的div</div>
        <div class="center_"> 我是屏幕中间悬浮的div</div>
        <div class="left_top"> 我是左上角悬浮的div</div>
        <div class="left_bottom"> 我是左下角悬浮的div</div>
    </body>
 
</html>