position定位的几种表示

Position的几种表示

  1. relative

    <!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Position</title>
    <style>
        *{
            padding: 0px;
            margin: 0px;
        }
        .div{
            height: 100px;
            width: 100px;
            background-color: red;
        }
        .div1{
            height: 100px;
            width: 100px;
            background-color: aquamarine;
            position: relative;
            left: 200px;
            top: 100px;
        }
        .div2{
            height: 100px;
            width: 100px;
            background-color: blueviolet;
        }
    </style>
</head>
<body>
    <div class="div">
        我是div
    </div>
    <div class="div1">
        我是div01
    </div>
    <div class="div2">
        我是div02
    </div>
</body>
</html>

  2. absolute

    <!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Position</title>
    <style>
        *{
            padding: 0px;
            margin: 0px;
        }
        .div{
            height: 100px;
            width: 100px;
            background-color: red;
        }
        .div_p{
            height: 300px;
            width: 300px;
            background-color: beige;
            position: relative;
            left: 300px;
        }
        .div1{
            height: 100px;
            width: 100px;
            background-color: aquamarine;
            position: absolute;
            left: 50px;
            top: 50px;
        }
        .div2{
            height: 100px;
            width: 100px;
            background-color: coral;
        }
        .div4{
            height: 100px;
            width: 100px;
            background-color: blueviolet;
        }
    </style>

</head>
<body>
    <div class="div">
        我是div
    </div>
    <div class="div_p">
        <div class="div1">
            我是div01
        </div>
        <div class="div2">
            我是div02
        </div>
    </div>
    <div class="div4">
        我是div04
    </div>
</body>
</html>

  3. fixed

    <!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>fixed</title>
    <style>
        *{
            padding: 0px;
            margin: 0px;
        }
        .div{
            height: 100px;
            width: 100px;
            background-color: red;
            position: fixed;
            top: 300px;
            left: 200px;
        }
        .div1{
            height: 100px;
            width: 100px;
            background-color: aquamarine;
        }
        .div2{
            height: 100px;
            width: 100px;
            background-color: blueviolet;
        }
    </style>
</head>
<body>
    <div class="div">
        我是div
    </div>
    <div class="div1">
        我是div01
    </div>
    <div class="div2">
        我是div02
    </div>
</body>
</html>

    小结

        <!--
     1.position
            relative
                -不会脱离文档流，原位置依旧会保存
            absolute(脱离文档流)
                -如果父标签不是relative,则以body为原始位置开始移动
                -如果父标签是relative,则以父标签为原始位置开始移动
            fixed
                --脱离文档流
            static(默认)
    -->
posted @ 2021-01-29 15:39  dgxacc  阅读(76)  评论(0)    收藏  举报