<!DOCTYPE html>
<meta charset="UTF-8">
<title>content animation</title>
<link rel="help" href="https://drafts.csswg.org/css-content/#content-property">
<meta name="test" content="box-shadow supports animation">
<link rel="author" href="mailto:graouts@apple.com" title="Antoine Quint">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<style>

.target::after {
  content: "default";
}

@keyframes content-animation {
  from { content: "from" }
  to   { con