css3 transform实现水平和垂直居中

代码如下：

<!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>Document</title>

    <style>

        html, body {

        height: 100%;

        }

        .wrapper {

            position: relative;

            width: 100%;

            height: 100%;

            background: url("background.jpg") center no-repeat;

            background-size: cover;

        }

        .wrapper .login {

            position: absolute;

            width: 255px;

            height: 300px;

            top: 50%;

            left: 50%;

            transform: translate(-50%, -50%);

            background-color: #eee;

        }

    </style>

</head>

<body>

    <div class="wrapper">

        <div class="login"></div>

    </div>

</body>

</html>

巴特西

css3 transform实现水平和垂直居中

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