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chromium/third_party/blink/web_tests/external/wpt/css/css-grid/chrome-bug-001.html 

<!DOCTYPE html>
<link rel="match" href="../reference/ref-filled-green-100px-square-only.html">
<link rel="help" href="https://crbug.com/1040069">
<meta name="assert" content="This test checks that a dynamic change relative position paints the grid correctly."/>
<style>
#target {
  display: grid;
  grid-template-columns: repeat(auto-fit, 50px);

  position: relative;
  top: 10px;
}
</style>
<p>Test passes if there is a filled green square.</p>
<div id="target">
  <div style="width: 100px; height: 100px; background: green;"></div>
</div>
<script>
document.body.offsetTop;
document.getElementById('target').style.top = '0px';
</script>