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Test Info:

<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<script>
function boom()
{
document.documentElement.offsetHeight;
document.body.style.textOrientation = "sideways";
}
</script>
</head>
<body onload="boom();" style="writing-mode: tb-rl; display: table;">Hello</body>
</html>