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<!DOCTYPE html>
<html class="reftest-wait">
  <link rel="author" title="Morten Stenshorne" href="mailto:mstensho@chromium.org">
  <link rel="help" href="https://www.w3.org/TR/css-multicol-1/#cf">
  <link rel="help" href="https://bugs.chromium.org/p/chromium/issues/detail?id=1336291">
  <link rel="match" href="../reference/ref-filled-green-100px-square.xht">
  <style>
    .hidden { display:none; }
    #mc > div { height:25px; contain:size; background:green;}
  </style>
  <p>Test passes if there is a filled green square and <strong>no red</strong>.</p>
  <div id="mc" style="columns:2; gap:0; width:100px; background:red;">
    <div></div>
    <div></div>
    <div></div>
    <div></div>
    <div class="hidden"></div>
    <div class="hidden"></div>
    <div class="hidden"></div>
    <div class="hidden"></div>
  </div>
  <script>
    requestAnimationFrame(()=> {
      requestAnimationFrame(()=> {
        for (let e of document.getElementsByClassName('hidden'))
          e.style.display = "block";
        document.documentElement.classList.remove("reftest-wait");
      });
    });
  </script>
</html>