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POmargin: auto is not centering
 

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    <p>In the following style from the website: <a href="http://6.470.scripts.mit.edu/css_exercises/exercise4.html" rel="noreferrer">http://6.470.scripts.mit.edu/css_exercises/exercise4.html</a></p> <pre><code>&lt;style type="text/css"&gt; #sponsors { margin:auto; margin-top:50px; overflow: hidden; width: auto; display: inline-block; } div.image img { margin: 3px; border: 1px solid #ffffff; } div.image a:hover img { border: 1px solid; } &lt;/style&gt; &lt;/head&gt; &lt;body&gt; &lt;h1&gt;Sponsors of 6.470&lt;/h1&gt; &lt;div id="sponsors"&gt; &lt;div class="image"&gt;&lt;a href=""&gt;&lt;img src="images/appian.png" width="150" height="85"&gt;&lt;/a&gt;&lt;/div&gt; &lt;div class="image"&gt;&lt;a href=""&gt;&lt;img src="images/dropbox.png" width="150px" height="85px"&gt;&lt;/a&gt;&lt;/div&gt; &lt;div class="image"&gt;&lt;a href=""&gt;&lt;img src="images/facebook.png" width="150px" height="85px"&gt;&lt;/a&gt;&lt;/div&gt; &lt;div class="image"&gt;&lt;a href=""&gt;&lt;img src="images/nextjump.png" width="150px" height="85px"&gt;&lt;/a&gt;&lt;/div&gt; &lt;div class="image"&gt;&lt;a href=""&gt;&lt;img src="images/palantir.png" width="150px" height="85px"&gt;&lt;/a&gt;&lt;/div&gt; &lt;div class="image"&gt;&lt;a href=""&gt;&lt;img src="images/quora.png" width="150px" height="85px"&gt;&lt;/a&gt;&lt;/div&gt; &lt;div class="image"&gt;&lt;a href=""&gt;&lt;img src="images/tripadvisor.png" width="150px" height="85px"&gt;&lt;/a&gt;&lt;/div&gt; &lt;div class="image"&gt;&lt;a href=""&gt;&lt;img src="images/vecna.png" width="150px" height="85px"&gt;&lt;/a&gt;&lt;/div&gt; &lt;/div&gt; &lt;/body&gt; </code></pre> <p>if the <code>width: auto</code> is removed from <code>#sponsors</code> then the <code>div#sponsors</code> is not center aligned even though <code>margin: auto</code> is used. </p> <p>Similarly if instead of <code>text-align: center</code> is replaced by <code>margin: auto</code> in body style above, then the <code>&lt;h1&gt;</code> will not be center aligned which is preposterous; </p> <p>because I have used <code>margin: auto</code> a lot of times and it was able to center the content without any issue. So hence help me and I will appreciate this a lot.</p> <p>PS: I used firefox and besides use the <code>doctype</code> tag it is still not able to center with <code>margin: auto</code>.</p>
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    1. USMd. Reazul Karim
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    1. COThe element with `id=sponsors` *is* centered. It just does not matter, since it has 100% width (as `div` elements have by default). You need to specify what exactly you wish to have centered and in which sense (what it should really look like).
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      1. USJukka K. Korpela
    2. COsee my answer i have added demo too
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      1. USDipesh Parmar
 

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