css/css-flexbox/intrinsic-size/col-wrap-009.html

<!DOCTYPE html>
<link rel="author" title="David Grogan" href="mailto:dgrogan@chromium.org">
<link rel="help" href="https://drafts.csswg.org/css-flexbox/#intrinsic-sizes">
<link rel="match" href="../../reference/ref-filled-green-100px-square.xht">
<meta name="assert"
  content="column wrap container's intrinsic width changes when its height changes." />

<style>
  #reference-overlapped-red {
    position: absolute;
    background-color: red;
    width: 100px;
    height: 100px;
    z-index: -1;
  }
  span {
    width: 50px;
    height: 100px;
  }
</style>

<p>Test passes if there is a filled green square and <strong>no red</strong>.
<div id=reference-overlapped-red></div>

<div style="display: flex; height: 200px;" id="target">
  <div
    style="display: flex; flex-flow: column wrap; width: max-content; background: green;">
    <span></span>
    <span></span>
  </div>
</div>

<script>
  target.offsetLeft;
  // With original height of 200px, both items fit in one flex line.
  // With height 100px, there are two lines and the items are side-by-side.
  target.style.height = "100px";
</script>