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Test Info:

<!DOCTYPE html>
<html class="reftest-wait">
<meta charset="utf-8">
<title>Container Queries - Size change during transitions crash</title>
<script src="/common/reftest-wait.js"></script>
<link rel="help" href="https://crbug.com/1451359">
<style>
#outer {
container-type: inline-size;
width: 100px;
}
#inner {
background-color: black;
transition: background-color 60s;
}
#inner.target {
background-color: white;
}
@container (width > 200px) {
#inner.target {
background-color: lime;
}
}
</style>
<p>Pass if no crash.</p>
<div id="outer">
<div id="inner">Look at my background</div>
</div>
<script>
inner.offsetTop;
inner.className = "target";
requestAnimationFrame(() => {
requestAnimationFrame(() => {
outer.style.width = "300px";
takeScreenshot();
});
});
</script>