wpt/css/css-conditional/css-supports-009.xht at master · web-platform-tests/wpt · GitHub

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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "https://umn0mtkzgkj46tygt32g.julianrbryant.com/TR/xhtml11/DTD/xhtml11.dtd">
<html xmlns="https://umn0mtkzgkj46tygt32g.julianrbryant.com/1999/xhtml">
 <head>
  <title>CSS Test: An @supports rule with valid syntax but a failing condition must not apply rules inside it</title>
  <link rel="author" title="Cameron McCormack" href="mailto:cam@mcc.id.au" />
  <link rel="help" href="https://umn0mtkzgkj46tygt32g.julianrbryant.com/TR/css3-conditional/#at-supports" />
  <meta name="assert" content="A conjunction of two @supports conditions must cause the @supports condition to fail if the first sub-condition fails."/>
  <link rel="match" href="support/pass.xht" />
  <style type="text/css"><![CDATA[
    html { background-color: green }
    @supports (color: rainbow) and (color: blue) {
      html { background-color: red }
    }
  ]]></style>
 </head>
 <body>
 </body>
</html>