<!DOCTYPE html>
<title>Default namespace respected inside :is() for non-subject compounds</title>
<link rel="help" href="https://drafts.csswg.org/selectors-4/#negation">
<link rel="match" href="/css/reference/blank.html">
<!--
As with :is(), default namespace declarations do not affect the compound
selector representing the *subject* of any selector within a :not()
pseudo-class, unless that compound selector contains an explicit universal
selector or type selector.
-->
<style>
@namespace "http://www.w3.org/1999/xhtml";
*|*.a {
display:initial;
}
/* This should apply, since the '.container' compound is affected by the
default namespace (even though the '.a' compound is not). */
*|g *|*:not(.container .a) {
display:none;
}
</style>
<svg xmlns="http://www.w3.org/2000/svg" width="200" height="100">
<g class=container>
<text class="a" y="1em">FAIL if this text is visible</text>
</g>
</svg>