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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 - Backdrop Filter should not be visible if element has visibility:hidden"
   href="https://bugs.webkit.org/show_bug.cgi?id=149318">149318</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>Backdrop Filter should not be visible if element has visibility:hidden
          </td>
        </tr>

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

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

        <tr>
          <th>Version</th>
          <td>WebKit Nightly Build
          </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>WebCore Misc.
          </td>
        </tr>

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

        <tr>
          <th>Reporter</th>
          <td>joepeck&#64;webkit.org
          </td>
        </tr>

        <tr>
          <th>CC</th>
          <td>dino&#64;apple.com, webkit-bug-importer&#64;group.apple.com
          </td>
        </tr></table>
      <p>
        <div>
        <pre>* SUMMARY
Backdrop Filter should not be visible if element has visibility:hidden.

* TEST
&lt;style&gt;
.back {
    width: 300px;
    height: 150px;
    margin: 100px;
    background: blue;
}
.top {
    width: 1000px;
    height: 50px;
    position: absolute;
    left: 0;
    top: 150px;
    -webkit-backdrop-filter: blur(50px);
    visibility: hidden;
}
&lt;/style&gt;
&lt;div class=&quot;back&quot;&gt;
    &lt;div class=&quot;top&quot;&gt;&lt;/div&gt;
&lt;/div&gt;

* STEPS TO REPRODUCE
1. Open test
  =&gt; did not expect div with visibility:hidden to still have blur visible</pre>
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