shadow-directionality-002.tentative.html

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This WPT test may be referenced by the following Test IDs:
- /css/css-scoping/shadow-directionality-002.tentative.html - WPT Dashboard Interop Dashboard

<!doctype html>

<title>CSS Test: directionality propagation in Shadow DOM, appending a shadow host.</title>

<link rel="author" href="mailto:emilio@crisal.io" title="Emilio Cobos Álvarez">

<link rel="help" href="https://html.spec.whatwg.org/#the-dir-attribute">

<link rel="help" href="https://github.com/whatwg/html/issues/3699">

<link rel="match" href="reference/green-box.html">

<p>Test passes if you see a single 100px by 100px green box below.</p>

<style>

  div { width: 100px; }

</style>

<div id="host-parent" dir="rtl"></div>

<script>

  let host = document.createElement("div");

  host.attachShadow({ mode: "open" }).innerHTML = `

    <style>:dir(rtl) { background: green; height: 100px; width: 100px; }</style>

    <div></div>

`;

  document.getElementById("host-parent").appendChild(host);

</script>