CSS---在浏览器中双向居中

<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8">
    <title></title>

    <style type="text/css">
        *{
            margin: 0;
            padding: 0;
        }
        body{
            height: 100%;
        }
        div{
            border: 1px solid #999;
            background: #ccc;
            width: 200px;
            height: 200px;
        }

        /*在浏览器中双向居中1,实测偏下*/
        .style1{
            position: absolute;
            left: 50%;
            top:50%;
            margin-left: -100px;
            margin-right: -100px;

        }

        /*在浏览器中双向居中2,实测偏下*/
        .style2{
            position: fixed;
            left: 50%;
            top:50%;
            margin-left: -100px;
            margin-right: -100px;
        }

        /*在浏览器中双向居中3,实测完美*/
        .style3{
            position: fixed;
            top: 0;
            right: 0;
            bottom: 0;
            left: 0;
            margin: auto;
        }

        /*在浏览器中双向居中4,实测完美*/
        .style4{
            position: absolute;
            top: 0;
            right: 0;
            bottom: 0;
            left: 0;
            margin: auto;

        }

        /*在浏览器中双向居中,在FF,IE,Chorme中实测通过,有点偏下。
        使用CSS3新属性transform:translate*/
        .style5{
            position: absolute;
            top: 50%;
            left: 50%;
            transfrom:translate(-50%,-50%);
            /*-webkit-transfrom:translate(-50%,-50%);
            -moz-transfrom:translate(-50%,-50%);
            -ms-transfrom:translate(-50%,-50%);*/
        }

        /*弹窗居中,在IE,FF,Chrome实测无效*/
        .outbox:before{
            content: "";
            width: 0;
            height: 100%;
            display: inline-block;
            vertical-align:middle;
        }
        .outbox{
            position: fixed;
            top:0;
            right: 0;
            bottom: 0;
            left: 0;
            text-align: center;
        }
        .content{
            width: 200px;
            height: 200px;
            display: inline-block;
            vertical-align: middle;
        }


        /*在元素内部居中,只有一行(不换行)时可以实现垂直居中*/
        .center_vertical1{
            text-align: center;
            line-height: 200px;
        }
        /*将元素改成单元格显示模式,在IE,FF,Chrome实测无效*/
        .center_vertical2{
            display:table-cell;
            text-align: center;
            vertical-align: center;
        }
        /*使用CSS3 的-webkit-box,在chrome中通过,FF,IE实测无效*/
        .center_vertical3{
            display: -webkit-box;
            -webkit-box-pack:center;
            -webkit-box-align:center;
            display: -moz-box;
            -moz-box-pack:center;
            -moz-box-align:center;
            display: -ms-box;
            -ms-box-pack:center;
            -ms-box-align:center;
            display: box;
            box-pack:center;
            box-align:center;
        }

    </style>
</head>
<body>
    <div class="style6 center_vertical3">别迷信哥,哥其实只是一个传说!</div>
    <div class="outbox">
        <div class="content">do it youself.</div>
    </div>

</body>
</html>
原文地址:https://www.cnblogs.com/beast-king/p/5241813.html