testing/web-platform/tests/html/rendering/non-replaced-elements/the-fieldset-and-legend-elements/legend-in-slot.html


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<!DOCTYPE html>
<link rel="match" href="legend-in-slot-ref.html">

<div id="host">
  <legend id="legend">Was rendered legend</legend>
  <legend>Is rendered legend</legend>
</div>
<script>
let root = document.querySelector('#host').attachShadow({mode:"open"});
root.innerHTML = `
<fieldset>
  <slot></slot>
</fieldset>`;
document.body.offsetTop;
document.querySelector('#legend').remove();
</script>