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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Sometimes unable to scroll fixed div when the body is scrollable"
href="https://bugs.webkit.org/show_bug.cgi?id=151015">151015</a>
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<th>Summary</th>
<td>Sometimes unable to scroll fixed div when the body is scrollable
</td>
</tr>
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<th>Classification</th>
<td>Unclassified
</td>
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<th>Product</th>
<td>WebKit
</td>
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<th>Version</th>
<td>WebKit Nightly Build
</td>
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<th>Hardware</th>
<td>Macintosh
</td>
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<th>OS</th>
<td>Unspecified
</td>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>Normal
</td>
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<th>Priority</th>
<td>P2
</td>
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<th>Component</th>
<td>WebCore Misc.
</td>
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<th>Assignee</th>
<td>webkit-unassigned@lists.webkit.org
</td>
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<th>Reporter</th>
<td>wenson_hsieh@apple.com
</td>
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<pre>Created <span class=""><a href="attachment.cgi?id=265034" name="attach_265034" title="Try scrolling the page and then the sidebar">attachment 265034</a> <a href="attachment.cgi?id=265034&action=edit" title="Try scrolling the page and then the sidebar">[details]</a></span>
Try scrolling the page and then the sidebar
When a page contains a scrollable fixed div and the page is scrolled, the hit-region of the fixed div does not appear to scroll with the page, so attempts to scroll the fixed div will instead scroll the page.
This is easily observed in the following websites:
<a href="https://docs.angularjs.org/api">https://docs.angularjs.org/api</a>
<a href="http://underscorejs.org">http://underscorejs.org</a>
<a href="https://developer.apple.com/library/safari/documentation/AppleApplications/Reference/SafariWebContent/Introduction/Introduction.html">https://developer.apple.com/library/safari/documentation/AppleApplications/Reference/SafariWebContent/Introduction/Introduction.html</a>
as well as the attached test case, where scrolling the page and then hovering over the sidebar and attempting to scroll it will instead cause the page to scroll again.</pre>
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