File: going-out-of-flow-after-spanner.html

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<!DOCTYPE html>
<title>Taking the sole box after a spanner out of flow, then remove it</title>
<link rel="author" title="Morten Stenshorne" href="mstensho@chromium.org">
<link rel="help" href="https://www.w3.org/TR/css-multicol-1/#the-multi-column-model">
<meta name="assert" content="An absolutely positioned box is still contained by the multicol container if its containing block is inside the multicol container">
<div id="multicol" style="columns:3;">
  <div style="position:relative;">
    <div style="column-span:all;"></div>
    <div id="victim" style="width:100%; height:300px;"></div>
  </div>
</div>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script>
test(() => {
  var multicol = document.getElementById("multicol");
  var victim = document.getElementById("victim");
  assert_equals(multicol.getBoundingClientRect().height, 100);
  victim.style.position = "absolute";
  assert_equals(multicol.getBoundingClientRect().height, 100);
  victim.style.display = "none";
  assert_equals(multicol.getBoundingClientRect().height, 0);
}, "Going out of flow and still fragmented");
</script>