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POWhy does this a element have its size set to 0px x 0px when positioned using 'relative'?
 

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  1. POWhy does this a element have its size set to 0px x 0px when positioned using 'relative'?
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    <p>I have been using <a href="http://www.zurb.com/playground/javascript-annotation-plugin" rel="nofollow noreferrer">this JavaScript image annotation plugin</a> to add annotations to a project - I managed to get it working correctly on a blank web page with just this HTML:</p> <pre><code>&lt;div id="sample-image"&gt; &lt;img src="img.jpg"&gt;&lt;/img&gt; &lt;/div&gt; </code></pre> <p>And this CSS for the annotations:</p> <pre><code>.circle { border-radius: 50%/50%; width: 20px; height: 20px; background: black; } </code></pre> <p>This produces the correct result...</p> <p><img src="https://i.stack.imgur.com/JiKLU.png" alt="example showing correct positioning"></p> <p>However when I went to add this to another project, using Twitter's Boostrap and this HTML</p> <pre><code>&lt;div class="container-fluid"&gt; &lt;div class="row-fluid"&gt; &lt;div data-spy="affix" data-offset-top="200" class="span3"&gt; &lt;div class="well sidebar-nav"&gt; &lt;ul class="nav nav-list"&gt; &lt;li&gt;&lt;a href="#contact"&gt;Contact&lt;/a&gt;&lt;/li&gt; &lt;/ul&gt; &lt;/div&gt; &lt;/div&gt; &lt;div style="float:right" class="span9"&gt; &lt;div id="sample-image"&gt; &lt;img src="img.jpg"&gt;&lt;/img&gt; &lt;/div&gt; &lt;/div&gt; ... </code></pre> <p>The elements are positioned to the top of the page because by default they have position: aboslute property like so:</p> <pre><code>&lt;a class="circle" data-toggle="tooltip" data-placement="top" data-original-title="Church" rel="tooltip" onmouseover="$(this).tooltip('show')" style="left: 406px; top: 247px; position: absolute;"&gt;&lt;/a&gt; </code></pre> <p>Changing this to position: relative causes them to be placed correctly but their size is set to 0px x 0px according to Chrome so they are not displayed.</p> <p>Any ideas why this might be?</p> <p>Thanks, Jake</p>
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    1. USRobin van Baalen
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    1. COcompare the computed CSS of the spots between 2 sites .
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    2. COWhere does the width and height come from? Check in Chrome dev tools. No doubt there'll be a twitter bootstrap class adding that somewhere.
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    3. COWhere does the `<a>` get appended to? Is it the `id=sample-image`?
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