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<!doctype html>
<!--
Any copyright is dedicated to the Public Domain.
http://creativecommons.org/publicdomain/zero/1.0/
-->
<meta charset="utf-8">
<title>CSS Test: calc rounding doesn't accumulate a lot of error.</title>
<link rel="author" href="mailto:mats@mozilla.com" title="Mats Palmgren">
<link rel="author" href="mailto:emilio@crisal.io" title="Emilio Cobos Álvarez">
<link rel="help" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1323735">
<link rel="help" href="https://drafts.csswg.org/css-values/#funcdef-calc">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<style>
body {
background: #f3f5f6;
}
div {
font-size: 15px;
width: 401px;
margin: 20px;
background: #fff;
display: flex;
flex-wrap: wrap;
}
b {
height: 50px;
background: red;
width: calc((100% - 4.5em) / 4); /* .5em gutters */
}
b:not(:last-child) {
margin-right: 1.5em;
}
</style>
<div><b></b><b></b><b></b><b></b></div>
<script>
test(function() {
assert_equals(document.querySelector("div").offsetHeight, 50);
}, "calc() doesn't accumulate much error that makes flex items overflow");
</script>
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