| <!DOCTYPE html> |
| <style> |
| html { |
| background: red; |
| /* an "L" shape */ |
| clip-path: polygon(50px 50px, 100px 50px, 100px 100px, 150px 100px, 150px 150px, 50px 150px); |
| will-change: transform; |
| } |
| div { |
| width: 500px; |
| height: 500px; |
| background: green; |
| } |
| </style> |
| <link rel="help" href="http://www.w3.org/TR/css-masking-1/#the-clip-path"> |
| <link rel="help" href="https://drafts.fxtf.org/compositing/#rootgroup"> |
| <link rel="help" href="https://drafts.fxtf.org/compositing/#pagebackdrop"> |
| <link rel="match" href="reference/clip-path-document-element-ref.html"> |
| <meta name="assert" content="Clip-path on the document element applies to the root background. |
| The test passes if there is a green 'L' shape without red."> |
| <div></div> |
