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Test Info:

<style>
body { display:contents }
</style>
<object id="a"></object>
<script>
document.body.offsetHeight;
document.getElementById("a").style.cssText="display:table-column-group"
document.body.offsetHeight;
document.body.style.cssText="scroll-snap-destination:6%"
document.body.offsetHeight;
</script>