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css实现垂直居中5个方法

<!DOCTYPE html>
<html>
    <head>
        <meta charset="utf-8">
        <title>垂直居中</title>
        <style>
            /* 方法5 */
            .outer{
                position: relative;
                height: 300px;
                width: 300px;
                display: flex;
                border: 1px solid #6A5ACD;
            }
            .inner{
                height: 200px;
                width: 200px;
                margin: auto;
                background: salmon;
            } 
            /* 方法4 */
            /* .outer{
                position: relative;
                height: 300px;
                 300px;
                border: 1px solid #6A5ACD;
            }
            .inner{
                position: absolute;
                top: 50%;
                left: 50%;
                transform: translate(-100px,-100px);
                height: 200px;
                 200px;
                background: salmon;
            } */
            /* 方法3 */
            /* .outer{
                position: relative;
                height: 300px;
                 300px;
                border: 1px solid #6A5ACD;
            }
            .inner{
                position: absolute;
                top: 50%;
                left: 50%;
                margin-left: -100px;
                margin-top: -100px;
                height: 200px;
                 200px;
                background: salmon;
            } */
            /* 方法2 */
            /* .outer{
                position: relative;
                height: 300px;
                 300px;
                display: flex;
                align-items: center;
                justify-content: center;
                border: 1px solid #6A5ACD;
            }
            .inner{
                height: 200px;
                 200px;
                background: salmon;
            } */
            /* 方法1 */
            /*.outer{
                position: relative;
                height: 300px;
                 300px;
                border: 1px solid #6A5ACD;
            }
             .inner{
                height: 200px;
                 200px;
                position: absolute;
                top: 0;
                left: 0;
                right: 0;
                bottom: 0;
                margin: auto;
                background: salmon;
            } */
        </style>
    </head>
    <body>
        <div class="outer">
            <div class="inner">inner</div>
        </div>
    </body>
</html>

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原文地址：https://www.cnblogs.com/changyuqing/p/12705473.html