<!DOCTYPE html> <html><head> <title>CSS Test (Conditional Rules): a supports condition declaration can not end with a semi-colon</title> <link href="http://www.gtalbot.org/BrowserBugsSection/css21testsuite/" rel="author" title="Gérard Talbot"> <link href="http://www.w3.org/TR/css3-conditional/#at-supports" rel="help" title="6. Feature queries: the '@supports' rule"> <link href="reference/at-supports-001-ref.htm" rel="match"> <meta content="invalid" name="flags"> <meta content="Each individual single supports condition declaration can not end up with a semi-colon ';'. A semi-colon is a punctuation separator of multiple CSS declarations and thus is not part of an individual CSS declaration per se." name="assert"> <!-- supports_condition_in_parens : ( '(' S* supports_condition ')' S* ) | supports_declaration_condition | general_enclosed ; --> <style> div { background-color: red; height: 100px; width: 100px; } @supports (margin: 0;) { div {background-color: red !important;} } @supports (margin: 0) { div {background-color: green;} } </style> </head> <body> <p>Test passes if there is a <strong>filled green square</strong> and <strong>no red</strong>.</p> <div></div> </body></html>