| <!DOCTYPE html> | |
| <meta charset="utf-8"> | |
| <link rel=author href="mailto:masonf@chromium.org"> | |
| <link rel=help href="https://open-ui.org/components/popup.research.explainer"> | |
| <link rel=match href="popup-hidden-display-ref.tentative.html"> | |
| <div popup>This content should be visible</div> | |
| <style> | |
| [popup] { | |
| display: block; /* This should make the popup visible */ | |
| top: 0; | |
| width: 300px; | |
| height: 200px; | |
| } | |
| </style> |