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<!DOCTYPE html>
<html>
<head>
<link rel="author" href="mailto:sammy.gill@apple.com">
<link rel="help" href="https://drafts.csswg.org/css-box-4/#margin-trim-flex">
<link rel="match" href="flex-column-style-change-triggers-layout-block-ref.html">
<meta name="assert" content="Flex items react to change in their flexbox's margin-trim value">
<style>
flexbox {
display: flex;
flex-direction: column;
width: min-content;
flex-wrap: wrap;
border: 1px solid black;
}
.initial-margin-trim {
margin-trim: block;
}
item {
display: block;
background-color: green;
width: 50px;
height: 50px;
margin-block: 10px;
}
</style>
</head>
<body>
<flexbox class="initial-margin-trim" id="to-no-margin-trim">
<item></item>
</flexbox>
<flexbox id="to-margin-trim">
<item></item>
</flexbox>
</body>
<script>
document.body.offsetHeight;
document.getElementById("to-no-margin-trim").style["margin-trim"] = "none";
document.getElementById("to-margin-trim").style["margin-trim"] = "block";
</script>
</html>
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