| <!DOCTYPE html> |
| <meta charset="utf-8"> |
| <title>CSS Scoping: Dynamic shadow root creation and whitespace optimization crash.</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=1465572"> |
| <link rel="match" href="reference/green-box.html"/> |
| <p>Test passes if you see a single 100px by 100px green box below.</p> |
| <!-- |
| It's important for the test-case that there's whitespace inside the host, |
| and that it's not assigned to any slot. |
| --> |
| <div id="host"> |
| <div style="display: inline" slot="the-slot"></div> |
| </div> |
| <script> |
| // Flush layout before creating a ShadowRoot, so that the whitespace ends up |
| // suppressed. |
| document.body.offsetTop; |
| host.attachShadow({ mode: "open" }).innerHTML = ` |
| <style> |
| ::slotted(div) { |
| width: 100px; |
| height: 100px; |
| background: green; |
| } |
| </style> |
| <slot name="the-slot"></slot> |
| `; |
| document.body.offsetTop; |
| host.firstElementChild.style.display = "block"; // or anything else that reframes the <div>. |
| </script> |
