transform-and-opacity-on-inline-001-ref.html

<!DOCTYPE html>
<html>
<title>CSS Test (Animations): Element.animate() animating both transform and opacity on an inline</title>
<link rel="author" title="L. David Baron" href="https://dbaron.org/">
<link rel="author" title="Google" href="http://www.google.com/">

<style>
#target {
  opacity: 0.4;
  will-change: opacity;
}
</style>

<body><span id="target">x</span></body>

chromium/third_party/blink/web_tests/external/wpt/web-animations/animation-model/keyframe-effects/transform-and-opacity-on-inline-001-ref.html