css/css-conditional/container-queries/change-display-in-container.html

<!doctype html>
<title>CSS Container Queries Test: Change display and box inside a container</title>
<link rel="help" href="https://drafts.csswg.org/css-conditional-5/#container-queries">
<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>