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Test Info:

<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<script>
function boom()
{
document.documentElement.offsetHeight;
document.body.appendChild(document.getElementById("x"));
document.documentElement.offsetHeight;
}
</script>
</head>
<body style="column-count: 4;" onload="boom();">
<div style="float: left; height: 10px; width: 10px;">
<div id="x">
<div style="height: 80px;"></div>
<div style="float: left; height: 10px;"></div>
</div>
</div>
</body>
</html>