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Test Info:
<!DOCTYPE html>
<!-- Any copyright is dedicated to the Public Domain.
<html>
<style>
details {
background-color: orange;
width: 500px;
height: 200px;
}
summary {
/* Hide the triangle for comparing with div in reftest. */
list-style-type: none;
background-color: green;
width: 50%;
}
div#in_summary {
position: absolute;
background-color: green;
top: 60px;
left: 100px;
width: 150px;
height: 100px;
}
div#before_summary {
position: absolute;
background-color: cyan;
top: 50px;
left: 50px;
width: 150px;
height: 100px;
}
</style>
<body>
<details open>
<div id="before_summary">div before summary</div> <!-- This div is at front. -->
<summary>Summary<div id="in_summary">div in summary</div></summary>
</details>
</body>
</html>