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Test Info:

<!doctype html>
<title>CSS Container Queries Test: Change display and box inside a container</title>
<link rel="match" href="change-display-in-container-ref.html">
<style>
.fail { display: inline; }
.pass { display: none; }
#container { container-type: size; width: 100px; }
@container (min-width: 200px) {
.fail { display: none; }
.pass { display: inline; }
}
</style>
<p>You should see the word PASS below.</p>
<div id="container">
<span>
<span class="fail">FAIL</span>
</span>
<span>
<span class="pass">PASS</span>
<span class="fail">FAIL</span>
</span>
</div>
<script>
container.offsetTop;
container.style.width = "auto";
</script>