chromium/third_party/blink/web_tests/external/wpt/svg/styling/use-element-web-animations.html

<!DOCTYPE html>
<html>
<title>SVG Test: Independent Web animations on svg:use instantiation and corresponding element</title>
<link rel="help" href="https://svgwg.org/svg2-draft/struct.html#UseElement">
<link rel="match" href="use-element-transitions-ref.html">
<style>
  use {
    font-size: 40px;
  }
  g {
    font-size: 120px;
  }
</style>
<svg>
  <use id="use_elm" xlink:href="#tmpl" />
  <g id="g_elm">
    <text id="tmpl" x="10" y="100">Hello!</text>
  </g>
</svg>
<script>
  tmpl.animate([
      { /* starts from computed font-size */ easing: "steps(2, start)"},
      { font-size: "80px" }
  ], 100000);
</script>