<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>CSS Test (Conditional Rules): Incorrect syntax of supports condition</title> <link rel="author" title="GĂ©rard Talbot" href="http://www.gtalbot.org/BrowserBugsSection/css21testsuite/"> <link rel="help" href="http://www.w3.org/TR/css3-conditional/#at-supports" title="6. Feature queries: the '@supports' rule"> <link rel="match" href="at-supports-001-ref.html"> <meta name="flags" content="invalid"> <meta name="assert" content="Each individual single supports condition must be enclosed by one opening parenthesis '(' and one closing parenthesis ')'."> <!-- 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 or padding: 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>