| <!DOCTYPE html> | |
| <link rel="help" href="https://drafts.csswg.org/css-contain/#content-visibility"> | |
| <link rel="help" href="https://crbug.com/1197492"> | |
| <map> | |
| <ul></ul> | |
| <progress></progress> | |
| <iframe></iframe> | |
| </map> | |
| <style> | |
| body, map, ul, progress { | |
| content-visibility: auto; | |
| height: 0vw; | |
| } | |
| </style> |