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<!doctype html>
<meta charset="utf-8">
<title>CSS Test: will-change: backdrop-filter should create a stacking context.</title>
<link rel="author" title="Philip Rogers" href="mailto:pdr@chromium.org">
<link rel="help" href="https://bugs.chromium.org/p/chromium/issues/detail?id=960953">
<link rel="help" href="https://drafts.csswg.org/css-will-change/#will-change">
<link rel="help" href="https://drafts.fxtf.org/filter-effects-2/#BackdropFilterProperty">
<link rel="match" href="green-square-100-by-100-ref.html">
<style>
html, body { margin: 0; }
.indicator {
position: absolute;
background-color: green;
z-index: 1;
}
.willchange {
will-change: backdrop-filter;
z-index: 0;
}
.child {
position: relative;
background-color: red;
z-index: 2;
}
.box {
width: 100px;
height: 100px;
}
</style>
<div class="indicator box"></div>
<div class="willchange box">
<!-- Because will-change: backdrop-filter creates a stacking context, this
child remains on bottom even though it has a higher z-index than the
indicator box. -->
<div class="child box"></div>
</div>
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