css/css-animations/animation-delay-011.html

<!doctype html>
<meta charset="utf-8">
<title>CSS Animations Test: inherited animation-delay with mismatched animation-name length</title>
<link rel="author" title="Emilio Cobos Álvarez" href="mailto:emilio@crisal.io">
<link rel="help" href="https://drafts.csswg.org/css-animations-1/#animations">
<link rel="match" href="animation-common-ref.html">
<style>
div:after {
  content: '';
  display: block;
  width: 100px;
  height: 100px;
  background: red;
  animation: doesntmatter 50s linear infinite,
             bg 100s step-end infinite;
  animation-play-state: paused;
  animation-delay: inherit;
}

@keyframes bg {
  50% { background: green; }
}
</style>
<div style="animation-delay: -50s"></div>