wpt/css/css-conditional/container-queries/pseudo-elements-010.html at master · web-platform-tests/wpt · GitHub

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<!DOCTYPE html>
<html class="reftest-wait">
<title>CSS Container Queries Test: Container for highlight pseudo elements</title>
<link rel="help" href="https://un5n798jx6qx6j0rmf2verhh.julianrbryant.com/css-conditional-5/#query-container">
<link rel="match" href="pseudo-elements-010-ref.html">
<script src="/common/reftest-wait.js"></script>
<style>
  .container { container-type: inline-size; }
  #outer { width: 300px; }
  #inner { width: 500px; }

  #inner::highlight(hi) {
    color: red;
    background: transparent;
  }
  @container (width >= 400px) {
    #inner.green::highlight(hi) {
      color: green;
      background: transparent;
    }
  }
</style>
<div id="outer" class="container">
  <div id="inner" class="container">
    <span id="hi">Highlight</span>
  </div>
</div>
<script>
  let highlight_range = document.createRange();
  highlight_range.selectNode(hi);
  CSS.highlights.set("hi", new Highlight(highlight_range));

  requestAnimationFrame(() => {
    requestAnimationFrame(() => {
      inner.classList.add("green");
      takeScreenshot();
    });
  });
</script>