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Test Info:

<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>
CSS Test: baseline of scrollable "details" element should be derived
from its margin-box.
</title>
<link rel="author" title="Daniel Holbert" href="mailto:dholbert@mozilla.com">
<link rel="author" title="Mozilla" href="https://www.mozilla.org">
<link rel="match" href="reference/baseline-of-scrollable-2-ref.html">
<style>
.overflow-ib {
overflow: hidden;
display: inline-block;
}
details {
height: 40px;
width: 100px;
/* Transparent text & "details-arrow", so that it's easier to make
a simple reference case: */
color: transparent;
border-color: gray;
border-style: solid;
border-width: 2px 3px 4px 5px;
padding: 4px 5px 7px 8px;
margin: 1px 2px 3px 4px;
}
</style>
</head>
<body>
Test passes if the a/b text aligns with the bottom margin-edge of the
gray rects.
<br><br>
a
<details class="overflow-ib">
c<br>d<br>e<br>f<br>g
</details>
b
<br>
a
<details class="overflow-ib" open>
c<br>d<br>e<br>f<br>g
</details>
b
<br>
a
<div class="overflow-ib">
<details>
c<br>d<br>e<br>f<br>g
</details>
</div>
b
<br>
a
<div class="overflow-ib">
<details open>
c<br>d<br>e<br>f<br>g
</details>
</div>
b
</body>
</html>