| <!DOCTYPE html> |
| <meta charset="utf-8"> |
| <title>CSS Test: two BODY elements</title> |
| <link rel="author" title="Oriol Brufau" href="mailto:obrufau@igalia.com"> |
| <link rel="help" href="https://drafts.csswg.org/css-overflow-3/#overflow-propagation"> |
| <link rel="help" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1987284"> |
| <meta name="assert" content="If there are multiple <body> elements, the |
| one that propagates `overflow` to the viewport is the first one. |
| |
| Here we insert a cloned body before the original one, so the original |
| needs to stop propagating because the clone will do it instead. |
| |
| Therefore, the cloned <body> should get `overflow: visible` and its |
| overflowing contents should be visible. And the original <body> should |
| be able to keep `overflow: hidden` and hide its overflowing contents."> |
| <link rel="match" href="overflow-body-propagation-012-ref.html"> |
| <style> |
| body { |
| overflow: hidden; |
| width: 0px; |
| height: 0px; |
| border: solid green; |
| border-width: 0 400px 200px 0; |
| margin-bottom: 0; |
| } |
| body:not(#clone) { |
| margin-top: 0; |
| } |
| body > div { |
| background: red; |
| width: 400px; |
| height: 200px; |
| } |
| #clone { |
| border-color: red; |
| margin-top: revert; |
| } |
| #clone > div { |
| background: green; |
| } |
| </style> |
| <body> |
| <div></div> |
| </body> |
| <script> |
| let clone = document.body.cloneNode(true); |
| clone.id = "clone"; |
| document.documentElement.prepend(clone); |
| </script> |
