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<!DOCTYPE html>
<meta charset="utf-8">
<title>CSS Test: Dynamic change to the inline-size of a block container</title>
<link rel="author" title="Ting-Yu Lin" href="mailto:tlin@mozilla.com">
<link rel="author" title="Mozilla" href="https://www.mozilla.org/">
<link rel="help" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1731653">
<link rel="stylesheet" href="/fonts/ahem.css">
<link rel="match" href="../reference/ref-filled-green-100px-square.xht">
<meta name="assert" content="This test verifies that the dynamic change to the block container's inline-size triggers the reflow of its children">
<style>
#block {
inline-size: 100px;
block-size: 100px;
font: 50px/1 Ahem;
color: green;
word-break: break-all;
}
#block > div {
/* The following inline-size and padding will give the div a border-box
inline-size of 100px, both before and after this test's dynamic
modification. */
inline-size: 50%;
padding-right: calc(100px - 50%);
background: red;
}
</style>
<p>Test passes if there is a filled green square and <strong>no red</strong>.</p>
<div id="block">
<div>XXXX</div>
</div>
<script>
/* Make sure the layout is up-to-date, which is essential to trigger the bug. */
document.documentElement.offsetHeight;
/* Change the block's inline-size to trigger incremental reflow. */
document.getElementById("block").style.inlineSize = "200px";
</script>
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