chromium/third_party/blink/web_tests/external/wpt/css/css-flexbox/nested-orthogonal-flexbox-relayout.html

<!DOCTYPE html>
<html>
<title>CSS Flexbox: nested orthogonal children on relayout.</title>
<link rel="help" href="https://www.w3.org/TR/css-flexbox-1/#flex-direction-property">
<link rel="match" href="reference/nested-orthogonal-flexbox-relayout-ref.html">
<meta name="assert" content="This test ensures nested orthogonal flex items get properly relaid out when flexbox changes dimensions."/>
<style>
#column {
  display: flex;
  flex-direction: column;
  border: 5px solid yellow;
}

#row {
  display: flex;
  flex-direction: row;
  border: 5px solid blue;
}

.item {
  border: 5px solid green;
}
</style>
<body>
<div id="column">
  <div id="row">
    <div class="item">This text should not overflow its box</div>
  </div>
</div>
<script>
var columnBox = document.getElementById("column");
columnBox.offsetHeight;
columnBox.style.width = "200px";
</script>