| <link rel="help" href="https://drafts.csswg.org/css-contain/#content-visibility"> | |
| <link rel="help" href="https://crbug.com/1309693"> | |
| <iframe id="target" width=320 height=320></iframe> | |
| <style> | |
| :first-child { content-visibility: hidden; } | |
| html,body,ol { -webkit-column-count: 2; } | |
| </style> |