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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>CSS basic box model: getComputedStyle().margin</title>
<link rel="help" href="https://drafts.csswg.org/css-box-3/#propdef-margin">
<meta name="assert" content="margin computed value has absolute lengths.">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/css/support/computed-testcommon.js"></script>
<style>
#parent {
width: 200px;
}
#target {
width: 0px;
font-size: 40px;
}
</style>
</head>
<body>
<div id="parent">
<div id="target"></div>
</div>
<script>
const target = document.getElementById("target");
test_computed_value("margin", "10px");
test_computed_value("margin", "10px 20px 30px 40px");
test_computed_value("margin", "calc(0.5em + 10px)", "30px");
test_computed_value("margin", "30%", "60px");
// Since what should the margin be in presence of other margins is a bit
// unclear (https://github.com/w3c/csswg-drafts/issues/2328), reset the margin
// before testing.
target.style.margin = "0";
test_computed_value("margin-top", "10px");
target.style.margin = "0";
test_computed_value("margin-right", "20px");
target.style.margin = "0";
test_computed_value("margin-bottom", "30px");
target.style.margin = "0";
test_computed_value("margin-left", "40px");
</script>
</body>
</html>
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