JSFiddle - React, Tailwind, and code Playground

HTML

<div class="outer-container">
   <div class="inner-container">
     <div class="centered-content">
        <em>Data :</em>
        <table>
            <tr>
                <th>Name</th>
                <th>Age</th>
            </tr>
            <tr>
                <td>Tom</td>
                <td>15</td>
            </tr>
            <tr>
                <td>Anne</td>
                <td>15</td>
            </tr>
            <tr>
                <td>Gina</td>
                <td>34</td>
            </tr>
        </table>
     </div>
   </div>
</div>

CSS

body {
    margin : 0;
}

.outer-container {
    position : absolute;
    display: table;
    width: 100%;
    height: 100%;
    background: #ccc;
}

.inner-container {
    display: table-cell;
    vertical-align: middle;
    text-align: center;
}

.centered-content {
    display: inline-block;
    background: #fff;
    padding : 20px;
    border : 1px solid #000;
}