| <!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-open-display-ref.tentative.html"> |
| |
| <div popup=popup>This is a popup</div> |
| <div class=topmost></div> |
| |
| <style> |
| [popup] { |
| width: fit-content; |
| height: fit-content; |
| border: 1px solid; |
| padding: 1em; |
| margin: 1em; |
| background: white; |
| color: black; |
| } |
| .topmost { |
| position:fixed; |
| z-index: 999999; |
| top:0; |
| left:0; |
| width:1000px; |
| height:1000px; |
| background:green; |
| margin:0; |
| padding:0; |
| } |
| </style> |
| |
| <script> |
| document.querySelector('[popup]').showPopup(); |
| </script> |
