shadow-reassign-dynamic-001.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=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>

chromium/third_party/blink/web_tests/external/wpt/css/css-scoping/shadow-reassign-dynamic-001.html