<!doctype html>
<meta charset="utf-8">
<title>CSS Writing Modes Test: propagation of the writing-mode property from body to root with text children</title>
<link rel=help href="https://drafts.csswg.org/css-writing-modes-3/#principal-flow">
<link rel="match" href="wm-propagation-body-dynamic-change-003-ref.html">
<body style="writing-mode: vertical-rl"></body>
<script>
  document.documentElement.insertBefore(
    document.createTextNode("This text must be horizontal."), document.body);
  document.body.offsetTop;
  document.body.style.writingMode = "horizontal-tb";
</script>