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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - AX: "(inverted-colors)" match sometimes fails on change"
href="https://bugs.webkit.org/show_bug.cgi?id=168491">168491</a>
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<th>Summary</th>
<td>AX: "(inverted-colors)" match sometimes fails on change
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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>All
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<th>OS</th>
<td>All
</td>
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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>Accessibility
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<th>Assignee</th>
<td>webkit-unassigned@lists.webkit.org
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<th>Reporter</th>
<td>jcraig@apple.com
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<th>CC</th>
<td>webkit-bug-importer@group.apple.com
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<pre>The (inverted-colors) media feature from <a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED FIXED - AX: "(inverted-colors)" media query only matches on page reload; should match on change"
href="show_bug.cgi?id=163564">bug 163564</a> appears to match most of the time, for example, when toggling the setting on macOS or iOS if Safari is in the foreground. Or when using the Accessibility Inspector to change the setting.
Some times when it does not match:
- if you exit Safari on iOS and change via the settings app, the match does not fire when the app is returned to the foreground.
- if you lock the device or otherwise background Safari, the match does not fire again in Safari until you either 1) reload the page, or 2) rotate the device to trigger another orientation match change.
Once you reload the page, the subsequent changes fire appropriate matches. It seems like WebKit is trying to be efficient and not listen for match notifications if it thinks nothing should have changed. If you change the device orientation while it's in this state it seems to work as expected until the app is backgrounded again.</pre>
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