Horizontal and vertical centering above a sticky footer in CSS

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Given a sticky footer such as that on Ryan Fait\'s site with a fixed pixel height, is it possible to center, both horizontally and vertically, variable-size content in the space

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夕颜

2021-02-15 13:00
well, then you could set this for the vertical align of content:
```
.verticalalign{
width:270px;
height:150px;
position:absolute;
left:50%;
top:50%;
margin:-75px 0 0 -135px;
```
}
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一向

2021-02-15 13:19

I would suggest looking at Bobby van der Sluis's article on Footers at A List Apart.

Example #7 at the end of his article shows a vertically centered block. It does rely on scripting, but it is truly minimal.

edit You can also use a single-cell table to accomplish vertical centering. Incorporating it with Ryan Fait's sticky footer would give you something like this:

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en">
<head>
    <style type="text/css">        

    /* Original Sticky Footer: http://ryanfait.com/sticky-footer/ */

    html, body {
        margin: 0;
        height: 100%;
        width: 100%;
        }

    #footer {
        margin-top: -150px;
        height: 150px;
        }

    #footer {
        background: #bbd;
        }

    .block {
        width: 300px;
        padding: 20px;
        background: yellow;
        margin: 0 auto 150px; /* height of #footer */
        }

</style>
</head>
<body>

<table width="100%" height="100%" border="0" cellpadding="0" cellspacing="0">

    <tr><td>

        <div class="block">
            <h1>Vertically Centered!</h1>
            <p>This block will remain centered. Just needs that one table cell wrapping.</p>
        </div>

    </td></tr>
</table>

<div id="footer">Footer Content here</div>

</body>
</html>

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