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Test Info:

<!doctype html>
<style>
* { display: contents; }
</style>
<marquee>
<div id="target">
</div>
</marquee>
<script>
document.body.offsetTop;
let div = document.createElement('div');
div.style.display = "block";
div.appendChild(document.createTextNode('where am I'));
target.appendChild(div);
document.body.style.color = "red";
</script>