clip-sub-pixel-composited-layer.html

<!DOCTYPE html>
<html>
<head>
<style>
h1 {
	overflow: hidden;
	position: relative;
	display: inline-block;
	width: 14px;
	height: 14px;
}
span {
	display: block;
	position: absolute;
	width: 10px;
	height: 10px;
	border: 2px solid red;
}
div {
	padding-left: 10.5px;
	position: absolute;
}
.composited {
	will-change: transform;
	z-index: 1;
}
.test {
	border: 2px solid black;
}
</style>
</head>
<body>
<p>This tests that we properly clip sub-pixel positioned composited layers. There should be no red visible.</p>
<div>
	<h1 class="composited">
		<span class="test"></span>
	</h1>
</div>
<div>
	<h1>
		<span></span>
	</h1>
</div>

chromium/third_party/blink/web_tests/fast/sub-pixel/clip-sub-pixel-composited-layer.html