| <!DOCTYPE html> |
| <html lang="en"> |
| <meta charset="UTF-8"> |
| |
| <title>CSS Conditional Test: Unknown Functional Notation as False in @supports</title> |
| <meta name="assert" |
| content="Test passes if unknown but grammatical functional notations are treated as false in @supports."> |
| <link rel="help" href="https://www.w3.org/TR/css3-conditional/#at-supports"> |
| <link rel="author" title="Elika J. Etemad" href="http://fantasai.inkedblade.net/contact"> |
| <link rel="match" href="at-supports-001-ref.html"> |
| |
| <style> |
| div { |
| background: green; |
| height: 10px; |
| width: 100px; |
| } |
| |
| div { |
| background: red; |
| } |
| |
| @supports not unknown() { |
| .test1.bare { background: green; } |
| } |
| @supports (not (unknown())) { |
| .test1.wrapped { background: green; } |
| } |
| |
| @supports not unknown(with stuff) { |
| .test2.bare { background: green; } |
| } |
| @supports (not (unknown(with stuff))) { |
| .test2.wrapped { background: green; } |
| } |
| |
| @supports not unknown(!@#% { ... } more() @stuff [ ]) { |
| .test3.bare { background: green; } |
| } |
| @supports (not (unknown(!@#% { ... } more() @stuff [ ]))) { |
| .test3.wrapped { background: green; } |
| } |
| |
| .test4, .test5 { background: green; } |
| |
| @supports unknown() { |
| .test4.bare { background: red; } |
| } |
| @supports (unknown()) { |
| .test4.wrapped { background: red; } |
| } |
| |
| @supports unknown(with stuff) { |
| .test5.bare { background: red; } |
| } |
| @supports (unknown(with stuff)) { |
| .test5.wrapped { background: red; } |
| } |
| </style> |
| |
| <p>Test passes if there is a <strong>filled green square</strong> and <strong>no red</strong>.</p> |
| |
| <div class="test1 bare"></div> |
| <div class="test2 bare"></div> |
| <div class="test3 bare"></div> |
| <div class="test4 bare"></div> |
| <div class="test5 bare"></div> |
| <div class="test1 wrapped"></div> |
| <div class="test2 wrapped"></div> |
| <div class="test3 wrapped"></div> |
| <div class="test4 wrapped"></div> |
| <div class="test5 wrapped"></div> |