| <!DOCTYPE html> | |
| <meta charset="utf-8"> | |
| <title>Test reference</title> | |
| <link rel="author" title="Florian Rivoal" href="https://florian.rivoal.net/"> | |
| <style> | |
| body > div { | |
| font-family: monospace; /* to be able to reliably measure things in ch*/ | |
| font-size: 20px; | |
| color: transparent; | |
| writing-mode: vertical-rl; | |
| background: green; | |
| } | |
| </style> | |
| <p>Test passes if there is a <strong>green rectangle</strong> below and <strong>no red</strong>. | |
| <div>0</div> |