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<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width">
<style>
.container {
position: relative;
width: 500px;
height: 200px;
margin: 20px;
border: 1px solid black;
}
.editable {
-webkit-user-modify: read-write;
background-color: aquamarine;
border: 2px solid green;
}
.overlapper {
position: absolute;
top: 0;
height: 100%;
width: 50%;
background-color: rgba(255, 255, 255, 0.75);
border: 1px solid black;
z-index: 1;
box-shadow: 0 0 10px black;
}
.tap-point {
position: absolute;
height: 10px;
width: 10px;
border-radius: 50%;
background-color: red;
z-index: 1;
}
</style>
</head>
<body>
<h2>Non-composited overlap</h2>
<div class="container">
<div class="editable" style="margin: 10px; height: 100px">
</div>
<div class="overlapper">
</div>
</div>
<h2>Composited overlap</h2>
<div class="container">
<div class="editable" style="margin: 10px; height: 100px">
</div>
<div class="overlapper" style="transform: translateZ(0)">
</div>
</div>
<div class="tap-point" style="top: 150px; left: 270px"></div>
<div class="tap-point" style="top: 400px; left: 270px"></div>
<p>Tap near the red dots</p>
</body>
</html>
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