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Test Info:

<!DOCTYPE html>
<div id="container">
<div id="child" style="columns:2;">
<div style="display:flex;"></div>
<div style="display:grid;"></div>
<div style="display:table;"></div>
</div>
</div>
<script>
document.body.offsetTop;
container.style.columns = "2";
container.style.display = "inline-table";
child.style.display = "table-footer-group";
</script>