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    <body><table border="1" cellspacing="0" cellpadding="8">
        <tr>
          <th>Bug ID</th>
          <td><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - CSS align-items and justify-content are ignored when flex container is a button element"
   href="https://bugs.webkit.org/show_bug.cgi?id=169700">169700</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>CSS align-items and justify-content are ignored when flex container is a button element
          </td>
        </tr>

        <tr>
          <th>Classification</th>
          <td>Unclassified
          </td>
        </tr>

        <tr>
          <th>Product</th>
          <td>WebKit
          </td>
        </tr>

        <tr>
          <th>Version</th>
          <td>Safari 10
          </td>
        </tr>

        <tr>
          <th>Hardware</th>
          <td>Unspecified
          </td>
        </tr>

        <tr>
          <th>OS</th>
          <td>Unspecified
          </td>
        </tr>

        <tr>
          <th>Status</th>
          <td>NEW
          </td>
        </tr>

        <tr>
          <th>Severity</th>
          <td>Normal
          </td>
        </tr>

        <tr>
          <th>Priority</th>
          <td>P2
          </td>
        </tr>

        <tr>
          <th>Component</th>
          <td>CSS
          </td>
        </tr>

        <tr>
          <th>Assignee</th>
          <td>webkit-unassigned&#64;lists.webkit.org
          </td>
        </tr>

        <tr>
          <th>Reporter</th>
          <td>pguerrant&#64;gmail.com
          </td>
        </tr></table>
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        <pre>Created <span class=""><a href="attachment.cgi?id=304560" name="attach_304560" title="Test Case">attachment 304560</a> <a href="attachment.cgi?id=304560&amp;action=edit" title="Test Case">[details]</a></span>
Test Case

See attached test case.  

The align-items and justify-content properties seems to be completely ignored when the flex container is a button.  It doesn't seem to matter if the flex direction is row or column, or what value you use for align-items and justify-content - setting them does not affect any change whatsoever.


Works as expected in Chrome, Firefox, IE11, and Edge.  Fails only in Safari</pre>
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          <li>You are the assignee for the bug.</li>
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