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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - visibilitychange:hidden doesn't fire during page navigations"
href="https://bugs.webkit.org/show_bug.cgi?id=151234">151234</a>
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<th>Summary</th>
<td>visibilitychange:hidden doesn't fire during page navigations
</td>
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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
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<th>Hardware</th>
<td>Unspecified
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<th>OS</th>
<td>Unspecified
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>Normal
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<th>Priority</th>
<td>P2
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<th>Component</th>
<td>HTML Events
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<th>Assignee</th>
<td>webkit-unassigned@lists.webkit.org
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<th>Reporter</th>
<td>ojan@chromium.org
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<th>CC</th>
<td>rniwa@webkit.org
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<pre>visibility state should transition to hidden whenever a page might go away. Unlike unload/pagehide, we can fire these reliably. See <a href="https://github.com/w3c/page-visibility/issues/18">https://github.com/w3c/page-visibility/issues/18</a> for more details, particularly, igrigorik's table near the top that shows where browser's don't fire this. The Firefox behavior of having green for all of the visibility-change-->hidden column is the one that matches the spec and makes for the best developer platform.
Ryosuke, are you the right person on WebKit to talk to about this?</pre>
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