<!DOCTYPE html>
<meta charset="utf-8">
<title>backdrop-filter: Zero-size div with backdrop filter shouldn't filter anything</title>
<link rel="author" title="Mason Freed" href="mailto:masonfreed@chromium.org">
<link rel="help" href="https://drafts.fxtf.org/filter-effects-2/#BackdropFilterProperty">
<link rel="match"  href="backdrop-filter-zero-size-ref.html">

<p>Expected: A single green box.</p>
<div class="colorbox"></div>
<div class="filterparent">
    <div class="filterchild"></div>
</div>

<style>
div {
    position: absolute;
    width: 100px;
    height: 100px;
}
.colorbox {
    background: green;
    left: 10px;
    top: 100px;
}
.filterparent {
    width: 0px;
    height: 0px;
    left: 50px;
    top: 150px;
    backdrop-filter: invert(1);
    background: lime;
}
.filterchild {
    top: 100px;
    background: #FFFFFF00;
}
</style>