float

float值不为none时和margin-left/right关系：

　　这里我想不明白3、5为什么这样布局？

　　float:right（left）设置后margin-left（right）没有作用？

　　—— 你想哈，float: right元素已经是

 

<!DOCTYPE html>
<html lang="zh-cn">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1, minimum-scale=1"/>
    <title>Title</title>
    <style>
        body {padding: 150px;}
        * {padding: 0;margin: 0;}

        .wrapper {
            margin-bottom: 25px;
            text-align: center;
            border: 6px solid #000;
        }

        .wrapper::after {
            display: block;
            content: '';
            width: 100%;
            height: 0;
            visibility: hidden;
            clear: both;
        }

        .boxOne {
            float: right;
            width: 100%;
            height: 80px;
            background: rgb(239, 241, 121);
        }

        .boxTwo {
            float: right;
            width: 100px;
            height: 50px;
            line-height: 50px;
            background: rgb(175,232,127);
        }

        .marginRight {margin-right: 100px}
        .marginRight- {margin-right: -100px}
        .marginLeft {margin-left: 100px}
        .marginLeft- {margin-left: -100px;}
    </style>
</head>
<body>
<div class="wrapper">
    <div class="boxOne">float:right <br/>margin:0</div>
    <div class="boxTwo">float:right</div>
</div>
<div class="wrapper">
    <div class="boxOne marginRight">float:right <br/>margin-right: 100px</div>
    <div class="boxTwo">float:right</div>
</div>
<div class="wrapper">
    <div class="boxOne marginRight-">float:right <br/>margin-right: -100px</div>
    <div class="boxTwo">float:right</div>
</div>
<div class="wrapper">
    <div class="boxOne marginLeft">float:right <br/>margin-left: 100px</div>
    <div class="boxTwo">float:right</div>
</div>
<div class="wrapper">
    <div class="boxOne marginLeft-">float:right <br/>margin-left: -100px</div>
    <div class="boxTwo">float:right</div>
</div>
</body>
</html>
View Code

 

 

posted @ 2020-11-17 17:56  し7709  阅读(133)  评论(0)  编辑  收藏  举报