gecko-dev/layout/reftests/transform-3d/opacity-preserve3d-4.html

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HTML

<!DOCTYPE html>
<html><head>
<style>
.first {
transform: translateZ(10px);
background-color: blue;
top: 0px;
}
.second {
background-color: green;
top: 40px;
}
.preserve {
transform-style: preserve-3d;
}
.leaf {
width: 100px;
height: 100px;
position:absolute;
}
</style>
</head><body>
<div class="preserve">
<div class="preserve" style="opacity:0.5">
<div class="leaf first"></div>
<canvas class="leaf second" width="100px" height="100px" id="canvas"></canvas>
</div>
</div>
<script>
var canvas = document.getElementById("canvas");
var ctx = canvas.getContext("2d");
ctx.fillStyle = "red";
ctx.fillRect(0, 0, 100, 100);
</script>
</body>
</html>