beginelement-instance-time-1.html | Explore in Territory

<!DOCTYPE html>
<title>beginElement() timing</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<svg width="100" height="20" style="border: grey 1px solid">
  <rect width="1" height="20">
    <animateMotion path="M0,0h100" dur="100ms"/>
  </rect>
</svg>
<script>
  async_test(t => {
    const svg = document.querySelector('svg');
    const motion = document.querySelector('animateMotion');
    motion.addEventListener('endEvent', t.step_func(() => {
      t.step_timeout(t.step_func(() => {
        motion.beginElement();
        let start = svg.getCurrentTime();
        requestAnimationFrame(t.step_func_done(() => {
          svg.pauseAnimations();
          let elapsed = svg.getCurrentTime() - start;
          let expected_pos = Math.min(elapsed * 1000, 100);
          let actual_pos = motion.parentElement.getCTM().e;
          assert_approx_equals(actual_pos, expected_pos, 2, `position after ${elapsed}`);
        }));
      }), 50);
    }), { once: true });
  });
</script>

chromium/third_party/blink/web_tests/external/wpt/svg/animations/beginelement-instance-time-1.html