shadow-reassign-dynamic-002.html | Explore in Territory

<!DOCTYPE html>
<meta charset="utf-8">
<title>CSS Scoping: Dynamic reassignment of a slot.</title>
<link rel="author" title="Emilio Cobos Álvarez" href="mailto:[email protected]">
<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=1465572">
<link rel="match" href="reference/green-box.html"/>
<div id="host">
  FAIL
  <div style="background: green" slot="the-slot"></div>
</div>
<script>
  document.body.offsetTop;
  host.attachShadow({ mode: "open" }).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>FAIL</slot>
  `;
  document.body.offsetTop;
  host.shadowRoot.querySelector("slot").setAttribute("name", "the-slot");
</script>

chromium/third_party/blink/web_tests/external/wpt/css/css-scoping/shadow-reassign-dynamic-002.html