css/css-animations/animation-duration-infinite.html

<!DOCTYPE html>
<html>
<head>
<title>Setting 'animation-duration' to an infinite value should not hang</title>
<link rel="author" title="Antoine Quint" href="mailto:graouts@webkit.org">
<link rel="help" href="https://bugs.webkit.org/show_bug.cgi?id=297596">
<link rel="match" href="animation-duration-infinite-ref.html">
<meta name="assert" content="Setting 'animation-duration' to an infinite value should not hang">
<style>

div {
  width: 100px;
  height: 100px;
  background-color: black;

  animation-name: slide;
  animation-duration: calc(infinity * 1s);
}

@keyframes slide {
  to { margin-left: 100px }
}

</style>
</head>
<body>
<div></div>
</body>
</html>