| <!DOCTYPE html> | |
| <title>CSS Reference: mask-image</title> | |
| <link rel="author" title="Xidorn Quan" href="https://www.upsuper.org"> | |
| <link rel="author" title="Mozilla" href="https://www.mozilla.org"> | |
| <style> | |
| #ref { | |
| position: absolute; | |
| width: 200px; | |
| height: 200px; | |
| background: green; | |
| } | |
| </style> | |
| <p>The test passes if there is a green square and no red below.</p> | |
| <div id="ref"></div> |