<!doctype html>
<head>
<title>CSS Test (Conditional Rules): @keyframes rules inside @supports</title>
<!-- This test is paired with at-media-content-003.html ; please keep them in sync -->
<link rel="author" title="Elika J. Etemad" href="http://fantasai.inkedblade.net/contact">
<link rel="help" href="https://www.w3.org/TR/css-conditional-3/#contents-of">
<link rel="help" href="https://www.w3.org/TR/css-conditional-3/#at-supports">
<link rel="help" href="https://www.w3.org/TR/css-animations-1/">
<link rel="match" href="at-supports-001-ref.html">
<meta name="assert"
content="Test passes if @keyframes rules within @supports are supported.">
<style>
div {
background: red;
width: 100px;
height: 100px;
animation: green 4s both;
}
@supports (color: blue) {
@keyframes green {
from {
background: green;
}
to {
background: green;
}
}
}
@supports not (color: blue) {
@keyframes green {
from {
background: red;
}
to {
background: red;
}
}
}
</style>
</head>
<body>
<p>Test passes if there is a <strong>filled green square</strong> and <strong>no red</strong>.</p>
<div class="test1"></div>
</body>
</html>
Codebase Browser
chromium