shadow-reassign-dynamic-001.html

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This WPT test may be referenced by the following Test IDs:
- /css/css-scoping/shadow-reassign-dynamic-001.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<meta charset="utf-8">

<title>CSS Scoping: Dynamic reassignment of a slot.</title>

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

<link rel="help" href="https://drafts.csswg.org/css-scoping/#selectors-data-model">

<link rel="help" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1435632">

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

<div id="host">

  <div id="green" style="background: green"></div>

  <div id="red" style="background: red" slot="myslot"></div>

</div>

<script>

  let root = host.attachShadow({ mode: "open" });

  root.innerHTML = `

    <style>::slotted(div) { width: 100px; height: 100px }</style>

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

    <slot name="myslot">FAIL</slot>

`;

  document.body.offsetTop;

  green.setAttribute("slot", "myslot");

  red.removeAttribute("slot");

</script>