raf-throttling-frame.html | Explore in Territory

<!DOCTYPE html>

<!-- Counts the number of animation frames that have been served to this frame. -->
<script>
let rafCount = 0;
function raf() {
  rafCount++;
  requestAnimationFrame(raf);
};
requestAnimationFrame(raf);

window.addEventListener('message', (e) => {
  e.source.postMessage(rafCount, "*");
});

</script>

chromium/third_party/blink/web_tests/http/tests/dom/resources/raf-throttling-frame.html