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<!DOCTYPE html>
<meta charset="utf-8">
<title>backdrop-filter: Filter input is at element bounds</title>
<link rel="author" href="mailto:masonf@chromium.org">
<link rel="help" href="https://drafts.fxtf.org/filter-effects-2/#BackdropFilterProperty">
<link rel="match" href="backdrop-filter-paint-order-ref.html">
<div>
<p>Expected: A pure white box with a blue border, surrounded by green.<br>
No green should be observed within the white box.<br>
No dark/black should be observed within the white box either.</p>
</div>
<div class="greenbox top"></div>
<div class="greenbox right"></div>
<div class="greenbox bottom"></div>
<div class="filterbox">
<div class="children" style="top:-31px;left:35px;"></div>
<div class="children" style="top:101px;left:35px;"></div>
<div class="children" style="top:35px;left:101px;"></div>
<div class="children" style="top:35px;left:-31px;"></div>
</div>
<style>
.filterbox {
position: absolute;
width: 100px;
height: 100px;
top: 150px;
left: 0px;
border: 1px solid blue;
backdrop-filter: blur(20px);
}
.greenbox {
position:absolute;
width: 150px;
height: 50px;
background: green;
}
.top {
top:100px;
left: 10px;
}
.right {
top:130px;
left: 102px;
width: 58px;
height: 150px;
}
.bottom {
top:252px;
left: 10px;
}
.children {
position: absolute;
width: 30px;
height: 30px;
top: 0px;
left: 0px;
background: green;
}
</style>
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