blob: 91eb77e1490864c5585bac3f3e0308eb1a7606ea [file] [log] [blame]
<!DOCTYPE html>
<!--
| Adjoining vertical margins collapse if both belong to vertically-adjacent box
| edges, i.e. top and bottom margins of a box that has no in-flow children.
| https://www.w3.org/TR/CSS21/box.html#collapsing-margins
-->
<!-- TODO: Test for a box that does/does not establish a new block formatting
context and that has/does not have zero computed 'min-height', zero
or 'auto' computed 'height', and no in-flow children. -->
<html>
<head>
<style>
.blue {
background-color: #2196f3;
height: 100px;
width: 100px;
}
.empty {
margin-top: 50px;
margin-bottom: 100px;
}
.indigo {
background-color: #3f51b5;
height: 100px;
width: 100px;
}
</style>
</head>
<body>
<div class="blue"></div>
<div class="empty"></div>
<div class="indigo"></div>
</body>
</html>