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POHow can an image of unknown size be centered within a div of known size?
 

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  1. POHow can an image of unknown size be centered within a div of known size?
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    <p>I'm trying to centre an image of unknown size within a div of known size, such that the image is centered both vertically and horizontally within the div and the aspect ratio of the image is not distorted.</p> <p>Here's an <a href="http://tinyurl.com/27p85bh" rel="nofollow">example</a></p> <p>This code almost does the job but both images look shifted down slightly... by maybe a couple of pixels. Why?</p> <p>The HTML;</p> <pre><code>&lt;body&gt; &lt;div class="container" id="c1"&gt; &lt;img src="test.jpg"/&gt; &lt;/div&gt; &lt;div class="container" id="c2"&gt; &lt;img src="test.jpg"/&gt; &lt;/div&gt; &lt;/body&gt; </code></pre> <p>The CSS;</p> <pre><code>.container { text-align: center; /* Center the image horizontally */ margin: 1em; /* Just for looks */ background: red; /* Just for looks */ } .container img { vertical-align: middle; /* See note below */ max-height: 100%; /* Limit the image size to fit the container */ max-width: 100%; /* Limit the image size to fit the container */ } #c1 { width: 8em; height: 4em; /* See note below */ line-height: 4em; /* See note below */ } #c2 { width: 5em; height: 7em; /* See note below */ line-height: 7em; /* See note below */ } </code></pre> <p>Note: The image is vertically centered within the container by making the line-height of the container the same as the height of the container, and applying {vertical-align: middle;} to the image. This should vertically center the image within the container and it almost works, except that the image is always two pixels too low.</p> <p>I've tried doing * {margin:0; padding:0} and several reset.css files but still the image appears to be shifted down a bit.</p> <p>So my question is really two questions;</p> <ol> <li>How can an image of unknown size be centered within a div of known size?</li> <li>Why is there a small gap between the img and the edge of the div?</li> </ol> <p>Regards, a CSS newbie.</p>
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    1. USNigel Alderton
    1. USNigel Alderton
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      1. POHow can an image of unknown size be centered within a div of known size?
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      1. POHow can an image of unknown size be centered within a div of known size?
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    1. COis it me or is the HTML not all there?
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      1. POHow can an image of unknown size be centered within a div of known size?
      1. USClarkeyBoy
    2. CO@ClarkeyBoy Fixed that, not indented properly.
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      1. POHow can an image of unknown size be centered within a div of known size?
      1. USOrbling
 

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