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Test Info:

<!DOCTYPE html>
<html class="reftest-wait">
<head>
<title>drawElementImage paints CSS opacity</title>
<link rel="help" href="https://github.com/WICG/html-in-canvas">
<link rel="match" href="css-opacity-on-div-ref.html">
<meta name="assert" value="A div with opacity paints with the opacity.">
<meta name="fuzzy" content="maxDifference=0-1;totalPixels=0-10000">
<script src="/common/reftest-wait.js"></script>
<script src="/html/canvas/resources/wait-for-canvas-paint.js"></script>
<style>
div {
width: 100px;
height: 100px;
background: green;
opacity: 0.5;
}
</style>
</head>
<body>
<canvas id=canvas width="100" height="100" layoutsubtree>
<div id="child"></div>
</canvas>
<script>
onload = async () => {
await waitForCanvasPaint(canvas);
var context = canvas.getContext("2d");
context.drawElementImage(child, 0, 0);
takeScreenshot();
};
</script>
</body>
</html>