<!doctype html> <title>CSS Scoping Module Level 1 - Dynamic fallback content</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="match" href="reference/green-box.html"/> <p>Test passes if you see a single 100px by 100px green box below.</p> <div id="host"> <span slot="myslot">FAIL</span> </div> <script> let root = host.attachShadow({ mode: "open" }); root.innerHTML = ` <slot name="myslot"> <div style="width: 100px; height: 100px; background: green"></div> </slot> `; document.body.offsetTop; host.firstElementChild.remove(); </script>