wpt/css/css-contain/crashtests/contain-nested-relayout-boundary.html at master · web-platform-tests/wpt · GitHub

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<!DOCTYPE html>
<div style="position: relative; width: 100px; height: 100px; overflow: hidden;">
  <div id="target" style="contain: size layout;">
    <canvas id="inner" width="0"></canvas>
  </div>
</div>
<script>
document.body.offsetTop;
document.getElementById('inner').width = '100';
document.getElementById('target').style.contain = 'initial';
</script>