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<!DOCTYPE html>
<html>
<meta charset="utf-8">
<title>CSS-Writing Modes Test: propagation of the writing-mode property from body to root</title>
<link rel="author" title="Ting-Yu Lin" href="mailto:tlin@mozilla.com">
<link rel="author" title="Mozilla" href="http://www.mozilla.org/">
<link rel=help href="https://drafts.csswg.org/css-writing-modes-3/#principal-flow">
<link rel="match" href="wm-propagation-body-dynamic-change-002-ref.html">
<meta name=assert content="The writing mode of the newly inserted body must be propagated to the root.">
<script>
function runTest() {
document.body.offsetHeight;
var newBody = document.createElement("body");
newBody.id = "new-body";
var oldBody = document.getElementById("old-body");
/* Insert a new <body> before the old one, which should become the primary <body>. */
document.documentElement.insertBefore(newBody, oldBody);
}
</script>
<style>
#new-body {
/* This writing-mode should propagate to the root element. */
writing-mode: vertical-rl;
margin: 0;
}
#old-body {
writing-mode: horizontal-tb;
inline-size: 100px;
}
div {
background-color: blue;
height: 100px;
width: 100px;
}
</style>
<body id="old-body" onload="runTest();">
<div></div>
<p>Test passes if you see a blue square in the upper-right corner of the page</p>
</body>
</html>
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