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Test Info:

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>CSS Test: :dir() selector</title>
<link rel="author" title="Astley Chen" href="mailto:aschen@mozilla.com">
<link rel="author" title="Mozilla" href="https://www.mozilla.org">
<meta name="assert" content="Test checks :dir() basic functions with valid and invalid values.">
<link rel="match" href="dir-style-01-ref.html">
<meta name="fuzzy" content="maxDifference=0-255; totalPixels=0-30">
<style>
div { text-align: left; }
:dir(ltr) { color: blue }
:dir(rtl) { color: lime }
:dir(foopy) { color: red }
</style>
</head>
<body>
<div>This element has default direction.</div>
<div dir="ltr">This element is ltr.</div>
<div dir="rtl">This element is rtl.</div>
<div dir="ltr">
<div>This element should inherit ltr.</div>
<div dir="ltr">This element is ltr.</div>
<div dir="rtl">This element is rtl.</div>
<div><span>Every <span>word <span>in <span>this <span>element <span>should <span>inherit <span>ltr</span></span></span></span></span></span></span></span>.</div>
</div>
<div dir="rtl">
<div>This element should inherit rtl.</div>
<div dir="ltr">This element is ltr.</div>
<div dir="rtl">This element is rtl.</div>
<div><span>Every <span>word <span>in <span>this <span>element <span>should <span>inherit <span>rtl</span></span></span></span></span></span></span></span>.</div>
</div>
<div dir="foopy">This element has an invalid dir attribute and
should have default direction.</div>
</body>
</html>