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Test Info:

<!DOCTYPE html>
<meta charset="utf-8">
<title>backdrop-filter: Correctly apply backdrop-filter with opacity</title>
<link rel="author" href="mailto:masonf@chromium.org">
<link rel="match" href="backdrop-filter-plus-opacity-ref.html">
<p>Expected: A green box.</p>
<div class="greenbox"></div>
<div class="filter"></div>
<style>
.greenbox {
position: absolute;
background: green;
width: 100px;
height: 100px;
top: 100px;
left: 60px;
}
.filter {
position: absolute;
width: 200px;
height: 200px;
top: 50px;
left: 10px;
backdrop-filter: invert(1);
opacity: 0;
}
</style>