关于百分比宽高div居中并垂直居中问题

<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>关于div居中</title>
</head>
<style type="text/css">
    html,
    body {
        height: 100%;
    }

    .div1 {
        width: 60%;
        height: 40%;
        border: 1px solid #000000;
    }

    .div2 {
        width: 40%;
        height: 45%;
        background-color: green;
    }
</style>

<body>
    <div class="div1">
        <div class="div2">

        </div>
    </div>
</body>

</html>

一、绝对定位

  

.div1 {
     position: relative;
 }

.div2 {
     margin: auto;
     position: absolute;
     top: 0;
     bottom: 0;
     left: 0;
     right: 0;
 }

 

二、translate

  

.div2 {
     position: relative;
     top: 50%;
     left: 50%;
     transform: translate(-50%, -50%);
 }

 三、flex

  

.div1 {
    display: flex;
    justify-content: center;
    align-items: center;
    }

 

  

posted @ 2018-02-26 13:31  浮缠  阅读(255)  评论(0)    收藏  举报