File: worklet-animation-pause-resume.https.html

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<!DOCTYPE html>
<html class="reftest-wait">
<title>Verify that calling pause immediately after playing works as expected</title>
<link rel="help" href="https://drafts.css-houdini.org/css-animationworklet/">
<link rel="match" href="references/translated-box-ref.html">

<script src="/common/reftest-wait.js"></script>
<script src="common.js"></script>
<style>
#box {
  width: 100px;
  height: 100px;
  background-color: green;
}
</style>

<div id="box"></div>

<script>
registerPassthroughAnimator().then(async _  => {
  const duration = 18; // a bit longer than a frame
  const box = document.getElementById('box');
  const effect = new KeyframeEffect(box,
    { transform: ['translateY(0px)', 'translateY(100px)'] },
    { duration: duration, iterations: 1, fill: 'forwards'}
  );

  const animation = new WorkletAnimation('passthrough', effect);
  // Immediately pausing animation should freeze the current time at 0.
  animation.pause();
  // Playing should cause animation to resume.
  animation.play();
  // Wait until we ensure animation has reached completion.
  await waitForAnimationFrameWithCondition( _ => {
    return animation.currentTime >= duration;
  });
  takeScreenshot();
});
</script>
</html>