CSS 固定定位和模式转换

作者: roy_pub | 来源:发表于2018-12-11 22:34 被阅读31次

CSS 固定定位和模式转换
CSS 定位模式转换
CSS相对定位（position）
HTML+CSS：css定位详解之相对定位、绝对定位和固定定位
CSS居中和定位
实现吸顶效果
css新增属性position:sticky
2018-09-27
CSS-固定定位
position:fixed会一直依据窗口进行定位吗

和浮动一样，绝对定位和固定定位，可以让块元素转化为行内块元素

两个块级元素，依次排列

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>

        * {
            margin: 0;
            padding: 0;
        }

        .leftAdv {
            width: 100px;
            height: 100px;
            background-color: red;
            position: fixed;
            top: 100px;
            left: 20px;
        }

        .rightAdv {
            width: 100px;
            height: 100px;
            background-color: red;
            position: fixed;
            top: 100px;
            right: 20px;
        }

        .nav {
            height: 80px;
            background-color: pink;
        }

        .container {
            width: 960px;
            height: 3000px;
            background-color: green;
        }
        
    </style>
</head>
<body style="height: 3000px">
    <div class="leftAdv"></div>
    <div class="rightAdv"></div>
    <div class="nav"></div>
    <div class="container"></div>
</body>
</html>

块级元素转为行内块元素，宽度为0，界面看不到效果

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>

        * {
            margin: 0;
            padding: 0;
        }

        .leftAdv {
            width: 100px;
            height: 100px;
            background-color: red;
            position: fixed;
            top: 100px;
            left: 20px;
        }

        .rightAdv {
            width: 100px;
            height: 100px;
            background-color: red;
            position: fixed;
            top: 100px;
            right: 20px;
        }

        .nav {
            height: 80px;
            background-color: pink;
            /*行元素转化为行内块元素，宽度为实际内容宽度，没有设定宽度*/
            position: fixed;
        }

        .container {
            width: 960px;
            background-color: green;
            height: 3000px;
        }

    </style>
</head>
<body style="height: 3000px">
    <div class="leftAdv"></div>
    <div class="rightAdv"></div>
    <div class="nav"></div>
    <div class="container"></div>
</body>
</html>

<!DOCTYPE html>
<html lang="en">
<head>
   <meta charset="UTF-8">
   <title>Title</title>
   <style>

       * {
           margin: 0;
           padding: 0;
       }

       .leftAdv {
           width: 100px;
           height: 100px;
           background-color: red;
           position: fixed;
           top: 100px;
           left: 20px;
       }

       .rightAdv {
           width: 100px;
           height: 100px;
           background-color: red;
           position: fixed;
           top: 100px;
           right: 20px;
       }

       .nav {
           height: 80px;
           background-color: pink;
           /*行元素转化为行内块元素，宽度为实际内容宽度，没有设定宽度*/
           position: fixed;
           /*设定宽度，占据一行*/
           width: 100%;
       }

       .container {
           width: 960px;
           background-color: green;
           height: 3000px;
       }

   </style>
</head>
<body style="height: 3000px">
   <div class="leftAdv"></div>
   <div class="rightAdv"></div>
   <div class="nav"></div>
   <div class="container"></div>
</body>
</html>