css/motion/offset-anchor-transform-box-fill-box-003.html

<!DOCTYPE html>
<title>CSS Motion Path: offset-anchor with transform-box: fill-box on the svg g element</title>
<link rel="help" href="https://drafts.fxtf.org/motion-1/#offset-anchor-property">
<link rel="match" href="offset-anchor-transform-box-fill-box-ref.html">
<meta name="assert" content="Tests offset-anchor together with a fill-box transform-box on the <g> element">
<style>
#target {
  transform-box: fill-box;
  offset-anchor: 25% 25%;
  offset-path: path("M75,-25v100");
  offset-distance: 50%;
}
</style>
<svg width="400" height="400">
  <rect width="100" height="100" fill="red"/>
  <g id='target'>
    <rect x="150" y="100" width="100" height="100" fill="green"/>
  </g>
</svg>